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Jincheng Zhu

Bio: Jincheng Zhu is an academic researcher from University of Science and Technology Beijing. The author has contributed to research in topics: Stacking & Organic solar cell. The author has an hindex of 1, co-authored 1 publications receiving 3 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a non-fused conjugated NFA (NFAs) based on bithiophene-based nonfused core (TT-Pi) was developed.
Abstract: Non-fullerene acceptors (NFAs) based on non-fused conjugated structures have more potential to realize low-cost organic photovoltaic (OPV) cells. However, their power conversion efficiencies (PCEs) are much lower than those of the fused-ring NFAs. Herein, a new bithiophene-based non-fused core (TT-Pi) featuring good planarity as well as large steric hindrance was designed, based on which a completely non-fused NFA, A4T-16, was developed. The single-crystal result of A4T-16 reveals that a three-dimensional interpenetrating network can be formed due to the compact π–π stacking between the adjacent end-capping groups. A high PCE of 15.2% is achieved based on PBDB-TF:A4T-16, which is the highest value for the cells based on the non-fused NFAs. Notably, the device retains ~84% of its initial PCE after 1300 h under the simulated AM 1.5 G illumination (100 mW cm−2). Overall, this work provides insight into molecule design of the non-fused NFAs from the aspect of molecular geometry control. Non-fullerene acceptors based on non-fused conjugated structures have potential for realizing low-cost organic photovoltaic cells, owing to its synthetic simplicity. Here, the authors develop a non-fused molecule with a three-dimensional interpenetrating network and compact π-π stacking, which is highly suitable for PV applications.

131 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper , photovoltaics (PV) is now an established technology and the most promising method for harvesting energy from the sun, which is attracting increasing attention as the traditional fossil-based energy sources are being depleted.
Abstract: Harnessing energy from the sun is attracting increasing attention as the traditional fossil-based energy sources are being depleted. Photovoltaics (PV) is now an established technology and the most promising method...

71 citations

Journal ArticleDOI
TL;DR: In this article , the development of NIR-absorbing materials for OPVs is reviewed, and the structure-property relationship between various kinds of donor (D, A units and absorption window are constructed to satisfy requirements for different applications.
Abstract: Near-infrared (NIR)-absorbing organic semiconductors have opened up many exciting opportunities for organic photovoltaic (OPV) research. For example, new chemistries and synthetical methodologies have been developed; especially, the breakthrough Y-series acceptors, originally invented by our group, specifically Y1, Y3, and Y6, have contributed immensely to boosting single-junction solar cell efficiency to around 19%; novel device architectures such as tandem and transparent organic photovoltaics have been realized. The concept of NIR donors/acceptors thus becomes a turning point in the OPV field. Here, the development of NIR-absorbing materials for OPVs is reviewed. According to the low-energy absorption window, here, NIR photovoltaic materials (p-type (polymers) and n-type (fullerene and nonfullerene)) are classified into four categories: 700-800 nm, 800-900 nm, 900-1000 nm, and greater than 1000 nm. Each subsection covers the design, synthesis, and utilization of various types of donor (D) and acceptor (A) units. The structure-property relationship between various kinds of D, A units and absorption window are constructed to satisfy requirements for different applications. Subsequently, a variety of applications realized by NIR materials, including transparent OPVs, tandem OPVs, photodetectors, are presented. Finally, challenges and future development of novel NIR materials for the next-generation organic photovoltaics and beyond are discussed.

67 citations

Journal ArticleDOI
23 Oct 2021
TL;DR: In this article, the state-of-the-art developments in polythiophene solar cells, with a focus on those made of poly(3-hexylthiophen) (P3HT) and nonfullerene small-molecule acceptors.
Abstract: The past decade has witnessed tremendous advances in the power conversion efficiency (PCE) of organic photovoltaic cells. Concomitantly, the chemical structures of present high-efficiency photovoltaic polymers have become more complex, leading to tedious and harsh synthetic processes and high batch-to-batch variations. By comparison, polythiophenes have gained considerable traction and hold tremendous promise in terms of cost and scalability. In this review, we present state-of-the-art developments in polythiophene solar cells, with a focus on those made of poly(3-hexylthiophene) (P3HT) and nonfullerene small-molecule acceptors. First, the structural optimization of polythiophenes is briefly discussed. Then, we provide a concise discussion of two notable aspects (miscibility matching and crystallization control) for performance optimization and associated research highlights in the past 5 years. We also highlight guidelines to ascertain the scientific challenges for polythiophene:nonfullerene solar cells. The development of new polythiophenes and their bulk-heterojunction blends will help to stimulate advances in many kinds of cost-effective electronics.

52 citations

Journal ArticleDOI
TL;DR: In this article , the authors discuss molecular design strategies to tune the absorption spectrum, energy level, and intermolecular aggregation as well as highlight the role of molecular electrostatic potential in decreasing energy loss.
Abstract: Single-junction organic solar cells (OSCs) have made significant progress in recent years. Innovations in material design and device optimization have improved the power conversion efficiencies to over 19%. In this review, based on recent advances, we discuss molecular design strategies to tune the absorption spectrum, energy level, and intermolecular aggregation as well as highlight the role of molecular electrostatic potential in decreasing energy loss. Then, we introduce the latest progress in four types of OSCs composed of different donor:acceptor combinations: polymer donor:small-molecule acceptor, all-polymer, all-small-molecule, and small-molecule donor:polymer acceptor OSCs. Finally, the challenges of OSCs in practical applications, including material cost, stability, and multi-function integration, are discussed.

47 citations

Journal ArticleDOI
TL;DR: In this paper, the authors summarized the recent advances in low-cost materials and eco-friendly processing for OSCs from the aspects of the synthetic method, photoactive materials, interfacial materials and processing solution.
Abstract: Solution processible organic solar cells (OSCs) have attracted much attention as one of the most promising candidates for sustainable energy techniques over the past two decades. So far, the power conversion efficiency (PCE) of OSCs has reached over 18% and increasingly closed the gap with inorganic and hybrid solar cells, which exceeds the requirement in efficiency towards commercial application. Low cost is generally labeled as one of the potential advantages of OSCs, compared with other photovoltaic technologies. However, currently most of the high-performance materials need tedious synthetic steps and/or suffer from relatively high cost. In addition, halogenated solvents which are highly toxic and expensive are widely used during processing; besides, they are not environmentally friendly, which would bring about extra expense for management and disposal. Thus, the development of low-cost high-performance materials, and cheap and “green” processing for OSCs is the imperative and urgent issue to be solved towards industrial-scale production. In this review, we summarize the recent advances in low-cost materials and eco-friendly processing for OSCs from the aspects of the synthetic method, photoactive materials, interfacial materials and processing solution. We hope that this review affords an overview and deep understanding of low-cost materials and processing solutions for OSCs. Finally, we will provide our perspectives on possible directions and challenges to further reduce the material cost of OSCs.

36 citations