Rubén D Costa

Rubén D Costa
Technische Universität München | TUM · Chair of Biogenic Functional Materials

Professor

About

163
Publications
18,653
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
6,698
Citations
Citations since 2017
83 Research Items
4033 Citations
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600

Publications

Publications (163)
Article
Hybrid light‐emitting diodes based on photon down‐converting filters with metal organic frameworks (MOFs) are mainly restricted to cross‐breed materials (i.e., nonemissive MOFs host and guest emitters) due to the lack of highly photostable and luminescent MOFs (LMOFs). This work reports a sustainable and cost‐effective blue‐emitting Zn‐based MOF wi...
Article
Full-text available
Quasi‐2D perovskites provide new opportunities for lighting and display applications due to their high radiative recombination and excellent stability. However, seldom attention has been placed on their self‐stability/working operation under ambient storage. Herein, quasi‐2D perovskites/Polyethylene oxide (PEO) films are studied, showing an unfores...
Article
Full-text available
Peri‐thiaxanthenothiaxanthene, an S‐doped analog of peri‐xanthenoxanthene, is used as a polycyclic aromatic hydrocarbon (PAH) scaffold to tune the molecular semiconductor properties by editing the oxidation state of the S‐atoms. Chemical oxidation of peri‐thiaxanthenothiaxanthene with H2O2 led to the relevant sulfoxide and sulfone congeners, wherea...
Article
Full-text available
Light‐emitting electrochemical cells (LECs) are the simplest and cheapest solid‐state lighting technology for soft and/or single‐use purposes. However, a major concern is a transition toward eco‐friendly devices (emitters/electrolytes/electrodes) to meet green optoelectronic requirements without jeopardizing device performance. In this context, thi...
Article
Metal halide perovskites have shown great potential for lighting. However, their low stability under irradiation/thermal stress and/or ambient storage conditions are critical for light‐emitting diodes (LEDs). Among the stabilization strategies, ligand surface modification is effective toward stable perovskites, but the dynamic ligand adsorption/des...
Article
Full-text available
Biophosphors with fluorescent proteins (FPs) are promising candidates to replace rare-earth color down-converting filters for white light-emitting diodes (LEDs). There is, however, a lack of deep-red FPs meeting high photostabilities, photoluminescence quantum yields (ϕ), and throughput expression yields. Herein, a new approach for the design of hi...
Article
Full-text available
White light-emitting electrochemical cells (LECs) comprising only [Cu(N^N)(P^P)]⁺ have not been reported yet, as all the attempts towards blue-emitting complexes failed. Herein, a multivariate analysis based on prior-art [Cu(N^N)(P^P)]⁺-based thin-film lighting (>90 papers) and refined with computational calculations identified the best blue-emitti...
Article
Full-text available
This work describes the design and synthesis of a p‑conjugated telluro[3,2‐ b ][1]‐tellurophene‐based synthon that, embodying pyridyl and haloaryl chalcogen‐bonding acceptors, self‐assembles into nanoribbons through chalcogen bonds. The ribbons π‐stack in a multi‐layered architecture both in single crystals and thin films. Theoretical studies of th...
Article
This work describes the design and synthesis of a p‑conjugated telluro[3,2‐ b ][1]‐tellurophene‐based synthon that, embodying pyridyl and haloaryl chalcogen‐bonding acceptors, self‐assembles into nanoribbons through chalcogen bonds. The ribbons π‐stack in a multi‐layered architecture both in single crystals and thin films. Theoretical studies of th...
Article
Full-text available
Metal halide perovskites (MHPs) have become a promising candidate in a myriad of applications, such as light‐emitting diodes, solar cells, lasing, photodetectors, photocatalysis, transistors, etc. This is related to the synergy of their excellent features, including high photoluminescence quantum yields, narrow and tunable emission, long charge car...
Article
Full-text available
The synthesis, photophysical/electrochemical characterization, and implementation in light-emitting electrochemical cells (LECs) of three novel red-emitting heteroleptic [Cu(N^N)(P^P)]PF6 complexes are reported. The complex design consists in combining i) the bridged di(pyrazin-2-yl)sulfane N^N ligand with expanded π-conjugation and electro-withdra...
Article
Bio-Derived Materials In article number 2100520, Rubén D. Costa and co-workers provided an extensive overview of emerging bio-derived materials suitable for organic solar cells, dye-sensitized solar cells and perovskite solar cells. Their production, handling, characterization, and implementation as bio-hybrid components, such as substrates, electr...
Preprint
Full-text available
Metal halide perovskites (MHPs) have become a promising candidate in a myriad of applications, such as light-emitting diodes, solar cells, lasing, photodetectors, photocatalysis, transistors, etc. This is related to the synergy of their excellent features, including high photoluminescence quantum yields, narrow and tunable emission, long charge car...
Preprint
Full-text available
However, their electrocatalytic activity is still poorly understood. This work deciphers the origin of the catalytic activity of counter-electrodes (CEs)/current collectors made of self-standing carbon nanotubes fibers (CNTfs) using Co$^(+2)$/Co$^(+3)$ redox couple electrolytes. This is based on comprehensive electrochemical and spectroscopic chara...
Article
The synthesis and characterization of a family of copper(i) complexes bearing a bridged bis-pyridyl ancillary ligand is reported, highlighting how the bridge nature impacts the photo- and electro-luminescent behaviours within the family. In particular, the phosphonium bridge led to copper(i) complexes featuring good electrochemical stability and hi...
Article
Full-text available
Accomplishing sustainability in optoelectronics, in general, and photovoltaics (PV), in particular, represents a crucial milestone in green photonics. Third generation PV technologies, such as organic solar cells (OSCs), perovskite solar cells (PSCs), and dye‐sensitized solar cells (DSSCs) have reached a mature age and are slowly making their way i...
Article
Full-text available
Metal halide perovskite (MHP)-based phosphor-converted light-emitting diodes (pc-LEDs) are limited by the low MHP stability under storage/operation conditions. A few works have recently established the in situ synthesis of MHPs into polymer matrices as an effective strategy to enhance the stability of MHP with a low-cost fabrication. However, this...
Preprint
Full-text available
Metal halide perovskites (MHPs) based phosphor-converted light-emitting diodes (pc-LEDs) are limited by the low MHP stability under storage/operation conditions. A few works have recently stablished the in-situ synthesis of MHPs into polymer matrices as an effective strategy to enhance MHPs stability with a low-cost fabrication. However, this is li...
Article
Full-text available
The synthesis, characterization, and application in light‐emitting electrochemical cells (LECs) of a series of near‐infrared (NIR) emitting Pt‐porphyrins (Pt‐por) with none and 20 F‐atoms and their respective Pt‐por‐polyads containing from 1 to 4 BODIPY (BDP) units (PtBDP) connected via tetra‐fluorophenyl triazole spacer groups are reported. The fu...
Preprint
In this work, we report on the fabrication of continuous transparent and flexible supercapacitors by depositing a CNT network onto a polymer electrolyte membrane directly from an aerogel of ultra-long CNTs produced floating in the gas phase. The supercapacitors combine record power density of $1370 kW kg^{-1}$ at high transmittance ($ca. 70%$), hig...
Article
Full-text available
Significant advances are realized in perovskite‐converted hybrid light‐emitting diodes (pc‐HLEDs). However, long‐living devices at high efficiencies still represent a major milestone with average stabilities of <200 h at ≈50 lm W−1 under low applied currents (<15 mA). Herein, a dual metal oxide‐coated CsPbBr3@SiO2/ZrO2 composite is prepared in a on...
Article
This work presents the first biphasic brookite–rutile organotitania, TiO2(B,R)–Phen, synthesized by a sol–gel method, under mild conditions and using 1,10-phenanthroline (Phen) as a crystal modifier and as a source of intermediate N2p states. Phen is able to coordinate to the Ti(IV) atom of the titanium alkoxide precursor, tetrabutyl orthotitanate...
Article
Full-text available
White‐light‐emitting electrochemical cells (WLECs) still represent a significant milestone, since only a few examples with moderate performances have been reported. Particularly, multiemissive white emitters are highly desired, as a paradigm to circumvent phase separation and voltage‐dependent emission color issues that are encountered following ho...
Article
Full-text available
Since the birth of light‐emitting electrochemical cells (LECs) in 1995, white LECs (WLECs) still represent a milestone. To date, over 50 contributions have been reported, presenting record WLECs with brightness of up to 10 000 cd m−2, efficiencies of >10 cd A−1, and excellent color rendering index >90 in different contributions. This is achieved fo...
Article
Full-text available
In article number 1906830, Rubén D. Costa and co‐workers report the exclusive emission behaviour of BN‐doped nanographenes with the B3N3 doping pattern, leading to one of the most efficient and stable white light‐emitting electrochemical cells. This doping pattern provides white electroluminescence spanning the whole visible range. This temperature...
Article
Full-text available
Carbon nanotubes are a versatile platform to develop sustainable and stable electrodes for energy-related applications. However, their electrocatalytic activity is still poorly understood. This work deciphers the origin of the catalytic activity of counter-electrodes (CEs)/current collectors made of self-standing carbon nanotubes fibers (CNTfs) usi...
Article
In this work, we report on the fabrication of continuous transparent and flexible supercapacitors by depositing a CNT network onto a polymer electrolyte membrane directly from an aerogel of ultra-long CNTs produced floating in the gas phase. The supercapacitors combine record power density of 1370 kW kg-1 at high transmittance (ca. 70%), high elect...
Article
Self-heating in light-emitting electrochemical cells (LECs) has been long overlooked, while it has a significant impact on i) device chromaticity by changing the electroluminescent band shape, ii) device efficiency due to thermal quenching and exciton dissociation reducing the external quantum efficiency (EQE), and iii) device stability due to ther...
Article
This review focuses on the state‐of‐the‐art of solid‐state lighting devices (SSLDs)—that is, organic light‐emitting diodes (OLEDs) and light‐emitting electrochemical cells (LECs)—prepared with transition metal complexes featuring thermally activated delayed fluorescence (TADF) mechanism. First, the TADF mechanism is briefly introduced, as well as t...
Article
Full-text available
This work presents a new family of bio-hybrid light-emitting diodes (Bio-HLEDs) using all-bio color down-converting coatings that combine silk fibroin (SF) as a packaging matrix and fluorescent proteins (FPs) as emitters. The thermal, mechanical, optical, and luminescent features of the FP–SF bio-phosphors were optimized with respect to the blend c...
Article
Self‐stability in light‐emitting electrochemical cells (LECs) based on Ir(III) ionic transition metal complexes (Ir‐iTMC) has been long overlooked. Herein, it is demonstrated that the nature of the active layer blending an archetype Ir‐iTMC as emitter and ionic electrolytes—ionic liquid (IL) or ionic polyelectrolyte (IP)—is paramount for the storag...
Article
This work presents a simple in-situ synthesis and stabilization of fluorescent gold nanoclusters (AuNCs) with different sizes using engineered protein scaffolds in water. The protein-AuNC hybrids show a dual emission (450 and 700 nm) with a record photoluminescence quantum yield of 20%. These features impelled us to apply them to bio-hybrid light-e...
Article
Full-text available
Bio-hybrid light-emitting diodes (Bio-HLEDs) based on color down-converting filters with fluorescent proteins (FPs) have achieved moderate efficiencies (50 lm/W) and stabilities (300 h) due to both thermal- and photo-degradation. Here, we present a significant enhancement in efficiency (~130 lm/W) and stability (>150 days) using a zero-thermal-quen...
Article
The direct reaction between CuI and 3,5-dichloropyridine, in acetonitrile at room temperature, gives rise to [Cu(Cl2-py)I]n (Cl2-py = 3,5-dichloropyridine), which consists of a Cu(I)–I double chain based coordination polymer (CP) grafted with 3,5-dichloropyridine. In this simple one-pot process, the modulation of the reaction conditions, i.e. sligh...
Article
This work rationalizes, for the first time, the electroluminescent behavior of a representative red-emitting contorted nanographene – i.e., hexabenzoovalene derivative – in small molecule light-emitting electrochemical cells (SM-LECs). This new emitter provides devices with irradiances of ca. 220 μW/cm2, external quantum efficiencies (EQE) of 0.78%...
Article
A new family of low‐energy emitting organic phosphors (OPs) based on [Pt2M4(CC‐1‐Np)8] clusters, in which M is either Ag(I) (1) or Cu(I) (2) and CC‐1‐Np is the strongly delocalized 1‐naphthylacetylide ligand, are presented. The inclusion of the 1‐naphthylacetylide moiety is crucial to achieve very emissive and stable OPs that do not experience ph...
Article
Full-text available
Color down‐converting filters with fluorescent proteins (FPs) embedded in a polymer matrix have led to new bio‐hybrid light‐emitting diodes (Bio‐HLEDs), featuring stabilities of 100 h and <1 min at low and high applied currents, respectively. Herein, the FP deactivation mechanism in Bio‐HLEDs at high driving currents is deciphered. Primarily, the n...
Article
Full-text available
The development of new active biocompatible materials and devices is a current need for their implementation in multiple fields, including the fabrication of implantable devices for biomedical applications and sustainable devices for bio-optics and bio-optoelectronics. This paper describes a simple strategy to use designed proteins to develop prote...
Article
The replacement of inorganic semiconductors with molecule-based compounds for applications in current-to-light conversion has led to a significant increase in interdisciplinary collaborations worldwide, affording new improved organic-light emitting diodes (OLEDs) ripe for commercial applications, as well as light-emitting electrochemical cells (LEC...
Article
Full-text available
Ionic transition‐metal complexes based on silver(I) metal core (Ag‐iTMCs) represent an appealing alternative to other iTMCs in solid‐state lighting owing to (i) their low cost and well‐known synthesis, (ii) the tunable bandgap, and (iii) the highly efficient photoluminescence. However, their electroluminescence behavior is barely studied. Herein, t...
Article
We designed and synthesized a series of novel electron‐accepting zinc(II)phthalocyanines (ZnPc) and probed them in p‐DSSCs by using CuO as photocathodes. By means of realizing the right balance between interfacial charge separation and charge recombination optimized FFs of 0.63 were obtained. With a control over FF in p‐DSSCs in hand we turned to t...
Article
We designed and synthesized a series of novel electron‐accepting zinc(II)phthalocyanines (ZnPc) and probed them in p‐DSSCs by using CuO as photocathodes. By means of realizing the right balance between interfacial charge separation and charge recombination optimized FFs of 0.63 were obtained. With a control over FF in p‐DSSCs in hand we turned to t...
Article
Full-text available
This work presents a pioneering multidisciplinary approach toward enhancing biohybrid light-emitting diodes (BioHLEDs), merging synthetic biology tools, polymer chemistry, and device engineering to design a thin color down-converting coating with a single white-emitting fluorescent protein (WFP). In particular, the WFP consists of fused red-, green...
Article
This work demonstrates that carbon nanotube (CNT) fiber electrodes consisting of a mesoporous and crystalline network of few-layer CNTs can be used as free-standing, unipolar, and dual counter-electrode (CE)/current-collectors in highly efficient and stable planar dye-sensitized solar cells (DSSCs). After device optimization, particularly in terms...
Article
Studies related to novel electrolyte concepts for p-type dye sensitized solar cells (p-DSSCs) set focus on developing alternatives to the iodide/triiodide (I-/I3-) redox couples, while attempts to improve the performance of the latter are scarce. In this study, we report on the first complete optimization of an I-/I3- based electrolyte for p-DSSCs...
Article
This work discloses a radically new way to prepare white-emitting hybrid nanoparticles, whose implementation in lighting devices provides encouraging proof-of-concept performances towards alternative sunlight sources. In detail, the new synthetic approach is based on the kinetic control of the formation of organometallic dots, built via the condens...
Article
The new heteroleptic Cu(I) complex [Cu(2,2′-dimethoxy-6,6′-bipirydine)(POP)]PF6 (POP = bis(2-(diphenylphosphino)phenyl)ether) showed enhanced thermal- and photo-stability, photoluminescence, and ionic conductivity features in thin films compared to those of the archetypal non-substituted complex [Cu(6,6′-bipirydine)(POP)]PF6. This led to enhanced l...
Article
All-inorganic perovskite nanocrystals (NCs), such as CsPbX3 (X = Cl, Br, I) NCs, have become particularly interesting for lighting applications due to their efficient synthesis, higher stability over hybrid organic-inorganic perovskites (HOIP) and narrow emission bands associated with high photoluminescence quantum yields (PLQYs). However, a critic...
Article
Full-text available
Solid‐state lighting (SSL) is one of the biggest achievements of the 20th century. It has completely changed our modern life with respect to general illumination (light‐emitting diodes), flat devices and displays (organic light‐emitting diodes), and small labeling systems (light‐emitting electrochemical cells). Nowadays, it is however mandatory to...
Article
Full-text available
Hybrid organic-inorganic and all-inorganic metal halide perovskites have been one of the most intensively studied materials during the last years. In particular, research focusing on understanding how to tune the photoluminescence features and to apply perovskites to optoelectronic applications has led to a myriad of new materials featuring high ph...
Article
Multilayer thin film assemblies have gained increasing interest because they allow for not only the integration of different materials, but they also combine their individual properties. In this context, the layer‐by‐layer (LbL) technique represents a versatile approach for the fabrication of multicomponent, layered films on solid supports. The int...
Article
Full-text available
Recently, the use of a new family of electroluminescent copper(I) complexes—i.e., the archetypal [Cu(IPr)(3-Medpa)][PF6] complex; IPr: 1,3-bis-(2,6-di-iso-propylphenyl)imidazole-2-ylidene; 3-Medpa: 2,2′-bis-(3-methylpyridyl)amine—has led to blue light-emitting electrochemical cells (LECs) featuring luminances of 20 cd m−2, stabilities of 4 mJ, and...
Article
Herein, we introduce a co-precipitation synthesis of CuO, which produces small and uniform nanoparticles (~ 12 nm) with a specific surface area of 97.3 m2/g. The resulting CuO nanoparticles are superior to the commercial ones, which have previously been used to prepare p-type DSSCs. In turn, we compared p-type DSSCs consisting of CuO-based photocat...
Article
An optoelectronic odyssey: ChemPlusChem presents its special issue on “New Materials and Approaches for Advanced Optoelectronics”, guest‐edited by Pedro Coto and Rubén Costa. This issue features top‐quality contributions covering new blue‐emitting coordination complexes, perovskites, nanocarbon‐based hybrids, metal–organic frameworks, hybrid metal...
Article
We report on the synthesis, photophysical, and electrochemical characterization of a new family of pentacene derivatives, which are applied in n-type dye-sensitized solar cells (DSSCs). As far as the molecular structure of the pentacene is concerned, the synthetic design focuses on cyano acrylic tethered at the 13-position of the pentacene chromoph...
Article
Full-text available
Nanostructuring constitutes a promising strategy to increase efficiency and stability of contemporary photocatalysts. Here we report on the synthesis of highly crystalline Ta2O5 nanotubes (NTs) by using carbon nanotubes (CNTs) as sacrificial hard templates and elucidate the role of residual Fe nanoparticles – often used as catalyst for the CNT grow...
Article
In the present study, catechol functionalized, positively charged ZnO nanorods (NRs) and anionic porphyrins were integrated into Layer-by-Layer (LbL) assemblies. In general we placed focus on the impact that different porphyrins, varying in their size and number of negative charges, exert on the LbL architecture in terms of morphology and spectrosc...
Article
In this work, a new strategy to design low-temperature (≤200 °C) sintered dye-sensitized solar cells (lt-DSSC) is reported to enhance charge collection efficiencies (ηcoll), photoconversion efficiencies (η), and stabilities under continuous operation conditions. Realization of lt-DSSC is enabled by the integration of hybrid nanoparticles based on T...
Article
Over the last decades, fluorescent proteins (FPs) have been extensively employed for imaging and tracing in cell-biology and medicine. However, their application for lighting devices like light-emitting diodes (LEDs) and lasers has recently started. The interest of FPs lies on their good photoluminescence features (high emission efficiency with a n...
Article
This work provides the synthesis, structural characterization, electrochemical and photophysical features, as well as the application in light-emitting electrochemical cells (LECs) of a novel small molecule belonging to the pyridilimidazo[1,5-a]pyridine family, namely 3-(2-methoxyphenyl)-5-methyl-1-(6-methylpyridin-2-yl)H-imidazo[1,5-a]pyridine (Me...
Article
Over the last decades, fluorescent proteins (FPs) have been extensively employed for imaging and tracing in cell-biology and medicine. However, their application for lighting devices like light-emitting diodes (LEDs) and lasers has recently started. The interest of FPs lies on their good photoluminescence features (high emission efficiency with a n...
Article
In this study, we report the preparation of two novel zinc-porphyrin families (ZnTEPP, ZnTHPP and ZnTDPP as well as ZnTbEPP, ZnTbHPP and ZnTbDPP) bearing four or eight alkoxy chains at their peripheral phenyl rings, respectively. The length of the alkyl-chains varies from 2, to 6 and to 12 carbon atoms. All the modified zinc-porphyrin derivatives w...