Shuixing Dai

Shuixing Dai
Peking University | PKU

PHD

About

44
Publications
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3,249
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Introduction
Additional affiliations
July 2017 - June 2019
Peking University
Position
  • PostDoc Position

Publications

Publications (44)
Article
Full-text available
We design and synthesize four fused-ring electron acceptors based on 6,6,12,12-tetrakis(4-hexylphenyl)-indacenobis(dithieno[3,2-b;2',3'-d]thiophene) as the electron-rich unit and 1,1-dicyanomethylene-3-indanones with 0 to 2 fluorine substituents as the electron-deficient units. These four molecules exhibit broad (550-850 nm) and strong absorption w...
Article
Full-text available
A new fluorinated nonfullerene acceptor, ITIC-Th1, has been designed and synthesized by introducing fluorine (F) atoms onto the end-capping group 1,1-dicyanomethylene-3-indanone (IC). On the one hand, incorporation of F would improve intramolecular interaction, enhance the push–pull effect between the donor unit indacenodithieno[3,2-b]thiophene and...
Article
A series of molecules with imide units bridged by the core of thiophene-based groups, namely N-dimethylaminopropyl-4-thiophene-1,8- naphthalimide (NT), bis(N-dimethylaminopropyl)-4-thiophene-1,8-naphthalimide (NTN), and bis(N-dimethylaminopropyl)-4-bithiophene-1,8-naphthalimide (N2TN), have been reported as cathode interfacial materials (CIMs) to r...
Article
Naphthalimide-based molecules, namely NEN and NTA, were designed and utilized as versatile cathode interlayers in organic solar cells (OSCs). Compared with one-armed NA previously reported and two-armed NEN, the NTA with a three-armed molecular structure exhibits more clearly the bathochromic-shifted absorption, aligned work function, stronger self...
Article
We used dual nonfullerene acceptors Y6:FINIC with 3D charge transport features and polymer donor PM6 to fabricate sequential-process heterojunction (SHJ) and bulk heterojunction (BHJ) organic solar cells (OSCs). FINIC has...
Article
A series of imide‐based small molecules, namely NA, NAA, and NEA with simple structures, were designed and synthesized by introducing different amine side‐chains into the benzene unit of imide, which were used as cathode interfacial materials in organic solar cells (OSCs). The amine side‐chains substitution position was systematically investigated...
Article
We synthesized three fused-ring electron acceptors (m-ITBr, o-ITBr and IT-2Br) based on indacenodithieno[3,2-b]thiophene as the core unit and 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile with 1 or 2 bromine substituents as the end-capped unit. The effects of bromine atom number and substituted position on molecular film absorption, energy leve...
Article
Solution−processed two−dimensional (2D) Ti3C2Tx nanosheets were incorporated into active layer of organic solar cells (OSCs) as a third component to obtain an enhancement of photovoltaic device performance. The power conversion efficiency (PCE) of devices was boosted from 9.34% to 10.72% for PBDB‐T:ITIC blend and from 14.64% to 16.25% for PM6:Y6 bl...
Article
The development of organic photovoltaic (OPV) cells has long been guided by the idea that excitons – bound electron-hole pairs created by light absorption – diffuse only 5-10 nm. True for many materials, this constraint led to an inherently complex device architecture – the bulk heterojunction – that has obscured our understanding of device physics...
Article
The bulk-heterojunction morphology of organic solar cells is well recognized to be critical to the device performance and has received extensive research efforts in developing viable morphology tuning strategies. In this work, we present a morphology tuning approach for the molecular packing orientation, that is, through the ternary mixing of a don...
Article
Full-text available
In tandem organic photovoltaics, the front subcell is based on large‐bandgap materials, whereas the case of the rear subcell is more complicated. The rear subcell is generally composed of a narrow‐bandgap acceptor for infrared absorption but a large‐bandgap donor to realize a high open‐circuit voltage. Unfortunately, most of the ultraviolet–visible...
Article
Four fused‐ring electron acceptors consisting of the same indacenobis(dithieno[3,2‐b ;2′,3′‐d ]thiophene) core and 2‐(3‐oxo‐2,3‐dihydroinden‐1‐ ylidene)malononitrile end‐groups without or with fluorination on side‐chains and/or end‐groups are compared to probe the impacts of fluorination position on molecular packing, optical, electronic, and photo...
Article
Full-text available
A new fluorinated electron acceptor (FINIC) based on 6,6,12,12‐tetrakis(3‐fluoro‐4‐hexylphenyl)‐indacenobis(dithieno[3,2‐b;2′,3′‐d]thiophene) as the electron‐donating central core and 5,6‐difluoro‐3‐(1,1‐dicyanomethylene)‐1‐indanone as the electron‐deficient end groups is rationally designed and synthesized. FINIC shows similar absorption profile i...
Article
Full-text available
The two-photon absorption (2PA) properties are investigated for two series of organic, π-conjugated, fused-ring, quadrupolar A-π-D-π-A chromophores of the type originally developed as non-fullerene acceptors for organic photovoltaics. These molecules are found to exhibit large nondegenerate two-photon absorption (ND2PA) cross-sections (ca. 6-27 × 1...
Article
A new fused‐ring electron acceptor FOIC1 was designed and synthesized. FOIC1 exhibits intense absorption in the range of 600‐1000 nm, HOMO/LUMO energy levels of –5.39/–3.99 eV, and electron mobility of 1.8 × 10–3 cm² V–1 s–1. Organic solar cells based on sequentially processed heterojunction (SHJ) with unusual inverted structure were fabricated. Th...
Article
While there are numerous approaches to functionalize conjugated polymers for organic solar cells (OSCs), one widely adopted approach is fluorination. Of the many different locations for fluorination, one of the least studied is the conjugated linker which connects the donor and acceptor moieties; further, all existing reports primarily explore mono...
Article
Full-text available
In this work, four fused ring electron acceptors (FREAs), 2F-C5, 2F-C6, 2F-C8 and 2F-C10, are developed to investigate the effect of side-chain size on the molecular properties and photovoltaic performance of FREA systematically. The elongation of side-chains in the FREAs not only improves their solubility in the processing solvent, but also enhanc...
Article
Full-text available
Fluorination of the donor polymer or non-fullerene acceptor (NFA) in an organic photovoltaic device is an effective method to improve device efficiency. Although there have been many studies on donor polymer fluorination, blends containing both a fluorinated donor and fluorinated NFA have rarely been reported. In this study, we use two donor polyme...
Article
Full-text available
We used mid-bandgap small molecule donor TR as a third component to fabricate ternary nonfullerene organic solar cells (OSCs) based on narrow-bandgap polymer donor PTB7-Th and narrow-bandgap nonfullerene acceptor FOIC. TR exhibits full miscibility with PTB7-Th and efficient energy transfer to PTB7-Th, enhances stacking of PTB7-Th, hole mobility and...
Article
Full-text available
Panchromatic ternary organic solar cells with photoresponse beyond 1000 nm were fabricated using low-bandgap polymer PTB7-Th as a donor and ultralow-bandgap F8IC and mid-bandgap IDT-2BR as nonfullerene acceptors. Ternary device with 20% IDT-2BR content in acceptors exhibits a power conversion efficiency of 12.1%, higher than that of its parent bina...
Article
We report fused ring electron acceptor (FREA)-perovskite hybrid as a promising platform to fabricate organic-inorganic hybrid solar cells with simple preparation, high efficiency and good stability. The FREA-perovskite hybrid films exhibit larger grain sizes and stronger crystallinity than the pristine perovskite films. Moreover, the FREA molecules...
Article
Full-text available
Organic heterojunction is indispensable in organic electronic devices, such as organic solar cells, organic light-emitting diodes and so on. Fabrication of core–shell nanostructure provides a feasible and novel way to prepare organic heterojunction, which is beneficial for miniaturization and integration of organic electronic devices. Fabrication o...
Article
Full-text available
We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, mor-phological and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorp...
Article
Full-text available
Semitransparent organic solar cells (ST‐OSCs) have appealing features, such as flexibility, transparency, and color in addition to generating clean energy, and therefore show potential applications in building integrated photovoltaics and photovoltaic vehicles. Concerted efforts in materials synthesis (particularly low‐band‐gap polymer donors and n...
Article
A fused tris(thienothiophene) (3TT) building block is designed and synthesized with strong electron-donating and molecular packing properties, where three thienothiophene units are condensed with two cyclopentadienyl rings. Based on 3TT, a fused octacylic electron acceptor (FOIC) is designed and synthesized, using strong electron-withdrawing 2-(5/6...
Article
Full-text available
We choose the high-performance nonfullerene acceptor ITIC-Th as an example, and incorporate electron-donating methoxy and electron-withdrawing F groups onto the terminal group 1,1-dicyanomethylene-3-indanone (IC) to construct a small library of four fused-ring electron acceptors. With this series, we systematically investigate the effects of the su...
Article
Full-text available
A fused-undecacyclic electron acceptor IUIC has been designed, synthesized and applied in organic solar cells (OSCs) and semitransparent organic solar cells (ST-OSCs). In comparison with its counterpart, fused-heptacyclic ITIC4, IUIC with a larger π-conjugation and a stronger electron-donating core exhibits a higher LUMO level (IUIC: −3. 87 eV vs....
Article
Naphtho[1,2-b:5,6-b′]dithiophene is extended to a fused octacyclic building block, which is end capped by strong electron-withdrawing 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile to yield a fused-ring electron acceptor (IOIC2) for organic solar cells (OSCs). Relative to naphthalene-based IHIC2, naphthodithiophene-based IOIC2 w...
Article
Full-text available
Three fused-ring n-type semiconductors based on 6,6,12,12-tetrakis(4-hexylphenyl)-indacenobis(dithieno[3,2-b;2,3-d]thiophene) end-capped with 1,1-dicyanomethylene-3-indanone substituted by different numbers of fluorine atoms (INIC series) are employed as interfacial materials to modify the surface of perovskite film in inverted planar perovskite so...
Article
Full-text available
Nonfullereneorganic solar cell (OPV)is one of the hottest frontiers in chemistry and materials science.China has been leading this hot frontier, and Chinese researchers have made great contribution to this research field. We proposed a novel concept—fused-ring electron acceptor (FREA), established a brand-new, high-performance nonfullerene acceptor...
Article
Two polymers containing (E-2,3-bis(thiophen-2-yl)acrylonitrile (CNTVT) as a donor unit, perylene diimide (PDI) or naphthalene diimide (NDI) as an acceptor unit, are synthesized by the Stille coupling copolymerization, and used as the electron acceptors in the solution-processed organic solar cells (OSCs). Both polymers exhibit broad absorption in t...
Article
Full-text available
An n-type semiconducting copolymer of perylene diimide and dithienothiophene (PPDIDTT) is used as a dual function interfacial layer to modify the surface of perovskite films in inverted perovskite solar cells. The PPDIDTT layer can remarkably passivate the surface trap states of perovskite through the formation of a Lewis adduct between the under-c...
Article
We report the synthesis of a series of copolymers, having 2,2 0-bithiophene as electron-donating moiety, and perylene diimide (PDI) and/or naphthalene diimide (NDI) as electron-accepting moiety, and employed as non-fullerene acceptors in polymer solar cells (PSCs). All the copolymers show wide absorption varying from 300 to 850 nm in the visible an...
Article
Full-text available
Bulk heterojunction (BHJ) organic solar cells (OSCs) have attracted considerable attention in the last two decade. Sequentially solution processed BHJ (s-BHJ) was developed in recent years. s-BHJ not only maintains some advantages of mixed BHJ (m-BHJ), but also exhibit other advantages over m-BHJ. However, to date, s-BHJ OSCs exhibit relatively low...
Article
Full-text available
Two spirobifluorene-based isomeric acceptors (SBF1 and SBF2) with electron-withdrawing 1,1-dicyanomethylene-3-indanone as end groups were theoretically studied, synthesized and applied as electron acceptors for solution-processed polymer solar cells (PSCs). SBF1 possessed three-dimensional molecular structure while SBF2 was more planar. The effect...
Article
Full-text available
Five copolymers, having 4,4,9,9-tetrakis(4-hexylphenyl)-indaceno[1,2-b:5,6-b?]-dithiophene as a donor unit, perylene diimide (PDI) and/or naphthalene diimide (NDI) as acceptor moieties, were synthesized by Stille coupling copolymerization, and used as electron acceptors in solution-processed polymer solar cells (PSCs). All five copolymers exhibited...
Article
Full-text available
A series of perylene diimide (PDI) dimers (PnTP, n = 0-3) with oligothiophene as bridge were designed, theoretically calculated, synthesized, and developed as electron acceptors for polymer solar cells (PSCs). The effects of oligothiophene bridge length on absorption, energy level, charge transport, morphology and photovoltaic properties of the mol...
Article
A novel solution-processable twisted dimeric perylene diimide (IDT-2PDI) with a bulky fused-ring indacenodithiophene as a bridge is developed as an electron acceptor for organic solar cells (OSCs). Poly(3-hexylthiophene) (P3HT):IDT-2PDI based OSCs have power conversion efficiencies (PCEs) up to 2.61% with a high fill factor of 0.668, and benzodithi...

Projects

Projects (3)
Archived project
Project
aim at the synthesis of non-fullerene acceptors and device fabrication.