Light intensity dependence of organic solar cell operation and dominance switching between Shockley–Read–Hall and bimolecular recombination losses DOI Creative Commons

Shin‐Young Ryu,

Na Young Ha, Y. H. Ahn

et al.

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: Aug. 18, 2021

We investigated the variation of current density-voltage (J-V) characteristics an organic solar cell (OSC) in dark and at 9 different light intensities ranging from 0.01 to 1 sun AM1.5G spectrum. All three conventional parameters, short-circuit currents (Jsc), open-circuit voltage (Voc), Fill factor (FF), representing OSC performance evolved systematically response intensity increase. Unlike Jsc that showed quasi-linear monotonic increase, Voc FF distinctive non-monotonic variations. To elucidate origin such variations, we performed extensive simulation studies including Shockley-Read-Hall (SRH) recombination losses. Simulation results were sensitive defect densities, simultaneous agreement 10 measured J-V curves was possible only with density [Formula: see text]. Based on analyses results, able separate losses into SRH- bimolecular-recombination components and, moreover, identify competition between bimolecular-loss responsible for aforementioned variations Jsc, Voc, FF. In particular, verified apparent demarcation which seemed appear intensities, originated same mechanism dominance switching

Language: Английский

Organic solar cells using oligomer acceptors for improved stability and efficiency DOI
Youcai Liang, Difei Zhang,

Zerun Wu

et al.

Nature Energy, Journal Year: 2022, Volume and Issue: 7(12), P. 1180 - 1190

Published: Nov. 10, 2022

Language: Английский

Citations

271
A time and resource efficient machine learning assisted design of non-fullerene small molecule acceptors for P3HT-based organic solar cells and green solvent selection DOI
Asif Mahmood, Jin‐Liang Wang

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(28), P. 15684 - 15695

Published: Jan. 1, 2021

A time and money efficient machine learning assisted design of non-fullerene small molecule acceptors for P3HT based organic solar cells is reported. Green solvents are also selected using predicted Hansen solubility parameters.

Language: Английский

Citations

183
Machine learning and molecular dynamics simulation-assisted evolutionary design and discovery pipeline to screen efficient small molecule acceptors for PTB7-Th-based organic solar cells with over 15% efficiency DOI
Asif Mahmood, Ahmad Irfan, Jin‐Liang Wang

et al.

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(8), P. 4170 - 4180

Published: Jan. 1, 2022

A multi-stage machine learning and molecular dynamics simulation-assisted pipeline is introduced for the time- cost-efficient design screening of small molecule acceptors organic solar cells.

Language: Английский

Citations

159
Polymer Solar Cells with 18.74% Efficiency: From Bulk Heterojunction to Interdigitated Bulk Heterojunction DOI
Xiaopeng Xu, Liyang Yu,

Huifeng Meng

et al.

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(4)

Published: Oct. 13, 2021

Abstract The most popular approach to fabricating organic solar cells (OSCs) is solution processing a mixture of donor (D) and acceptor (A) materials into an active layer with bulk heterojunction (BHJ) nanostructure. Herein, it demonstrated that the interdigitated (IHJ) more suitable nanostructure for high‐performance OSCs whereas long standing challenge realize well‐defined IHJ structures. In this study, facile versatile sequential method developed produce power conversion efficiency reaching 18.74% (18.10% BHJ counterpart) by film nanopores created wax additive, sequentially casting on top infiltrating nanopores. Compared BHJ, structure interpillar distance within exciton diffusion length can afford large D/A interface efficient dissociation minimized charge recombination while free electrons holes transport respective electrodes through straightforward pathways, thus enhance performance. Furthermore, D or A phase in device contacts only one electrode, which prevent shunting between anode cathode facilitate industrial mass production OSCs.

Language: Английский

Citations

156
Over 19.2% Efficiency of Organic Solar Cells Enabled by Precisely Tuning the Charge Transfer State Via Donor Alloy Strategy DOI Creative Commons
Jinhua Gao, Na Yu,

Zhihao Chen

et al.

Advanced Science, Journal Year: 2022, Volume and Issue: 9(30)

Published: Aug. 23, 2022

The large energy loss (Eloss ) is one of the main obstacles to further improve photovoltaic performance organic solar cells (OSCs), which closely related charge transfer (CT) state. Herein, ternary donor alloy strategy used precisely tune CT state (ECT and thus Eloss for boosting efficiency OSCs. elevated ECT in OSCs reduce generation (ΔECT ), promote hybridization between localized excitation nonradiative (ΔEnonrad ). Together with optimal morphology, afford an impressive power conversion 19.22% a significantly improved open-circuit voltage (Voc 0.910 V without sacrificing short-cicuit density (Jsc fill factor (FF) comparison binary ones. This contribution reveals that tuning via efficient way minimize

Language: Английский

Citations

152
High-speed sequential deposition of photoactive layers for organic solar cell manufacturing DOI
Rui Sun, Tao Wang, Xinrong Yang

et al.

Nature Energy, Journal Year: 2022, Volume and Issue: 7(11), P. 1087 - 1099

Published: Oct. 27, 2022

Language: Английский

Citations

131
Non‐Radiative Recombination Energy Losses in Non‐Fullerene Organic Solar Cells DOI
Dan He, Fuwen Zhao,

Chunru Wang

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(19)

Published: Feb. 5, 2022

Abstract Impressive short‐circuit current density and fill factor have been achieved simultaneously in single‐junction organic solar cells (OSCs) with the emergence of high‐performance non‐fullerene acceptors. However, power conversion efficiencies (PCEs) OSCs still lag behind those inorganic perovskite cells, mainly due to modest open‐circuit voltage ( V OC ) imposed by relatively large energy loss E ). Generally, can be divided into three parts. Among them, Δ 1 is inevitable for all photovoltaic depends on optical bandgap while radiative recombination loss, 2 , approach negligible value via finely matching donor acceptor material blend. The non‐radiative 3 becomes main barrier further reduce thus enhance PCE acceptor‐based OSCs. In this review, recent studies achievements about summarized from aspects design, morphology manipulation, ternary strategy, mechanism, theoretical study. It hoped that review helps get a deep understanding boost advance study

Language: Английский

Citations

122
Recent Research Progress of Organic Small‐Molecule Semiconductors with High Electron Mobilities DOI
Jiadi Chen, Weifeng Zhang, Liping Wang

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(11)

Published: Dec. 15, 2022

Organic electronics has made great progress in the past decades, which is inseparable from innovative development of organic electronic devices and diversity semiconductor materials. It worth mentioning that both these advances are inextricably linked to high-performance materials, especially representative n-type small-molecule materials with high electron mobilities. The small molecules have advantages simple synthesis process, strong intermolecular stacking, tunable molecular structure, easy functionalize structures. Furthermore, a remarkable important component for constructing complementary logic circuits p-n heterojunction Therefore, semiconductors play an extremely role field basis industrialization functional devices. This review focuses on modification strategies mobility at level, discusses detail applications field-effect transistors, light-emitting photodetectors, gas sensors.

Language: Английский

Citations

101
A-π-A structured non-fullerene acceptors for stable organic solar cells with efficiency over 17% DOI
Wei Liu, Jun Yuan, Can Zhu

et al.

Science China Chemistry, Journal Year: 2022, Volume and Issue: 65(7), P. 1374 - 1382

Published: May 25, 2022

Language: Английский

Citations

92
Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells DOI
Qi Feng, Yanxun Li, Rui Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 22, 2023

Abstract Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, long‐term stability OSCs still poses a severe challenge for their commercial deployment. To address this issue, dimer acceptor ( d T9TBO) with flexible linker is developed incorporation into small‐molecule acceptors form molecular alloy enhanced intermolecular packing and suppressed diffusion stabilize active layer morphology. Consequently, PM6 : Y6 T9TBO‐based device displays an improved power conversion efficiency (PCE) 18.41 % excellent thermal negligible decay after being aged at 65 °C 1800 h. Moreover, OSC also exhibits mechanical durability, maintaining 95 its initial PCE bended repetitively 1500 cycles. This work provides simple effective way fine‐tune stabilized morphology overcome trade‐off between stability.

Language: Английский

Citations

84