Rakesh Suthar

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• Postdoctoral Research Fellow at Rochester Institute of Technology

The growing importance of high‐speed and energy‐efficient photodetectors in broadband communication has sparked widespread interest in organic materials owing to their tunable optical characteristics and ease of production. However, this Schottky‐type organic photodetector (OPD) has low detectivity and a high dark current, requiring additional volt...

The structural disorder and aggregation of the third acceptor with the host active layer are critical in the light absorption, film morphology, and charge‐carrier mechanism of their photovoltaic blends to achieve highly efficient organic solar cells (OSCs). However, an effective third component needs to be introduced in the host binary blend as a c...

The imperative for achieving commercial success in organic solar cells (OSCs) lies in their efficient and stable operation within open-air environments, which enables large-scale production while concurrently reducing manufacturing costs. Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) is usually used as a hole transporting materi...

Raising the photocurrent and successively achieving a high power conversion efficiency (PCE) in organic solar cells (OSCs) with physically thin photoactive layers is usually a highly challenging task because of their excitonic nature. Herein, we utilized the synergistic plasmonic effects of multi-shaped Au nanostructures (diameter/edge length ∼50 n...

Although the power conversion efficiency (PCE) of single-junction organic solar cells (OSCs) has exceeded more than 19%, the biggest obstacle to the commercial application of OSCs is the low device stability. Herein, this work reports the development of hydrated vanadium pentoxide (HVO) as a hole transport layer (HTL) with outstanding hole-extracti...

Although doping has the potential to improve the performance of organic photovoltaic cell (OPVc), the doping’s effects on charge transport, recombination and energetic disorder are still obscure. Doping has two opposing effects: on the one hand, dopant ions create more traps center, while free dopant‐induced charges fill deep states., potentially p...

Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has significantly progressed with a rapid increase from 10 to 19% due to state-of-the-art research on nonfullerene acceptor molecules and various device processing strategies.

In the last few years, organic solar cells have emerged as potential applications of abundant low-power indoor internet of things devices, such as smart watches, calculators, remote control, and other devices. Since Indoor light intensity is much weaker than the standard 1-sun illumination, the effective utilization of indoor photons is crucial due...

Recent development of novel conjugated polymer donor and non-fullerene acceptor (NFA) materials with promising properties have led to an unprecedented rise in the power conversion efficiency (PCE) of organic solar...

This article presents recent advances in the ternary organic solar cell (TOSC), such as technological interventions from the material design to the device performance, which led to more than 19% of power conversion efficiency. The research and developments in TOSCs reported in the past decade have been inspiring and promising in terms of molecular...

Hybrid nanostructures with superior optical and electrical properties have shown great promise in improving the performance of photovoltaic devices. Herein, we report the development of metal-semiconductor hybrid nanostructures via the blending of chemically synthesized Au nanoparticles (NPs) (diameter ~17 nm) and liquid phase exfoliated WS2 nanosh...

The emergence of nonfullerene small-molecule acceptors (NFSMA) with the advantages of synthetic versatility, high absorption coefficient in wide wavelength range, and high thermal stability has attained the power conversion efficiency (PCE) exceeding 19% for resulted organic solar cells (OSCs) with the optimization of interface engineering and acti...

Understanding the linear and nonlinear optical responses of two-dimensional nanomaterials is essential to effectively utilize them in various optoelectronic applications. Here, few-layer MoS2 and WS2 nanoflakes with lateral size less than 200 nm were prepared by liquid-phase exfoliation, and their linear and nonlinear optical responses were studied...

Detailed understanding of the various influences of deposition conditions on the structure–property relationship for spray-coated polymer films is crucial for their scalable device applications. In the present study, the influences of in-situ substrate temperature and acoustic substrate vibration on the charge carrier dynamics of poly(3-hexylthioph...

Ternary polymer solar cells employing two polymers (P2, PTB7-Th) and one non-fullerene small molecule acceptor (Y6) were constructed using a conventional structure. The PTB7-Th, P2 and Y6 exhibit complementary absorption spectra therefore, the ternary blend consists of these three can maximize the photon harvesting efficiency which is advantageous...

Three D‐A conjugated copolymers based on the same DTNIA acceptor unit and different donor units i.e. 3TB (P1), DTN (P2), and DTB (P3) were formulated and synthesized. All the copolymers exhibited deep highest occupied molecular energy levels of ‐5.43, ‐5.50, and ‐5.51 eV for P1, P2, and P3, respectively, and showed an optical bandgap of 2.18, 2.12...

For conjugated polymers of interest in photovoltaic applications, control of the bandgap as well as the energy levels of the molecules are of great importance to improve the efficiency and performance of the resulting polymer solar cells. A general tactic for adjusting these properties via modification of the conjugated polymer structure is by usin...

In this work, two D−A conjugated polymers having same fluorinated benzothiadiazole acceptor and thiophene linker and different donor units (2,8‐dibromo‐4,6‐bis9n‐octylthiophene‐2‐yl)benzo(2,1‐b:3,4‐b’:5,6‐c”] trithiophene for P95 and 5,8‐dibromo‐2‐[5‐2(‐ethylhexyl)thiophene‐2yl]‐1H bisthieno[3,2‐e:2‘,3‘‐g]benzothiazole for P96 were synthesized. The...

Two donor -acceptor (D-A) conjugated polymers designed on same 8,10-bis (2-octyldodecyl)-8,10-dihydro-9H-bisthieno [2`,3`:7,8; 3”,2”:5,6]naphtho [2,3-d]imidazole-9-one donor and dissimilar acceptor units, i.e. benzothiadiazole (P104) and fluorinated benzothiadiazole (P105) were synthesized and investigated their photophysical and electrochemical pr...

The fast evolution of the narrow bandgap non‐fullerene acceptors requires the new conjugated wide bandgap polymers for the use of non‐fullerene polymer solar cells. In this work, we have designed two new wide bandgap A1‐D1‐A2‐D1 conjugated polymers with same dithieno[2,3‐e:3’,2’‐g]isoindole‐7,9(8H)‐dione (DTID) acceptor (A1) and D1 (thiophene donor...