Nonfused Nonfullerene Acceptors with an A–D–A′–D–A Framework and a Benzothiadiazole Core for High-Performance Organic Solar Cells DOI
Shuting Pang, Xia Zhou, Song Zhang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2020, Volume and Issue: 12(14), P. 16531 - 16540

Published: March 20, 2020

Nonfullerene acceptors (NFAs) have contributed significantly to the progress of organic solar cells (OSCs). However, most NFAs feature a large fused-ring backbone, which usually requires tedious multiple-step synthesis, and are not applicable commercial applications. An alternative strategy is develop nonfused NFAs, possess synthetic simplicity facile tunability in optoelectronic properties solid-state microstructures. In this work, we report two BTCIC BTCIC-4Cl, based on an A–D–A′–D–A architecture, same electron-deficient benzothiadiazole central core but different electron-withdrawing terminal groups. The optical properties, energy levels, molecular crystallinities were finely tuned by changing Moreover, decent power conversion efficiency 9.3 10.5% has been achieved respectively, blending them with appropriate polymer donor. These results demonstrate potential type for high-performance OSCs. Further development will be very fruitful employing building blocks via side-chain optimizations.

Language: Английский

Recent progress in organic solar cells (Part I material science) DOI
Yahui Liu, Bowen Liu, Chang‐Qi Ma

et al.

Science China Chemistry, Journal Year: 2021, Volume and Issue: 65(2), P. 224 - 268

Published: Dec. 27, 2021

Language: Английский

Citations

505
Random terpolymer based on thiophene-thiazolothiazole unit enabling efficient non-fullerene organic solar cells DOI Creative Commons
Jingnan Wu,

Guangwei Li,

Fang Jin

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Sept. 14, 2020

Abstract Developing a high-performance donor polymer is critical for achieving efficient non-fullerene organic solar cells (OSCs). Currently, most high-efficiency OSCs are based on named PM6, unfortunately, whose performance highly sensitive to its molecular weight and thus has significant batch-to-batch variations. Here we report (named PM1) random ternary polymerization strategy that enables with efficiencies reaching 17.6%. Importantly, the PM1 exhibits excellent reproducibility. By including 20% of weak electron-withdrawing thiophene-thiazolothiazole (TTz) into PM6 backbone, resulting (PM1) can maintain positive effects (such as downshifted energy level reduced miscibility) while minimize negative ones (including temperature-dependent aggregation property). With higher greater synthesis reproducibility, promise become work-horse material OSC community.

Language: Английский

Citations

274
n-Type Molecular Photovoltaic Materials: Design Strategies and Device Applications DOI
Qihui Yue,

Wuyue Liu,

Xiaozhang Zhu

et al.

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(27), P. 11613 - 11628

Published: May 27, 2020

The use of photovoltaic technologies has been regarded as a promising approach for converting solar energy to electricity and mitigating the crisis, among these, organic photovoltaics (OPVs) have attracted broad interest because their solution processability, flexibility, light weight, potential large-area processing. development OPV materials, especially electron acceptors, one focuses in recent years. Compared with fullerene derivates, n-type non-fullerene molecules some unique merits, such synthetic simplicity, high tunability absorption levels, small loss. In last 5 years, cells based on achieved significant breakthrough power conversion efficiency from approximately 4% over 17%, which is superior those fullerene-based cells; meanwhile, created brand new opportunities application OPVs special situations. This Perspective analyzes key design strategies high-performance molecular materials highlights instructive examples various applications, including ternary tandem cells, high-efficiency semitransparent power-generating building facades windows, indoor driving low-power-consumption devices. Moreover, accelerate pace toward commercialization OPVs, existing challenges future directions are also reviewed perspectives efficiency, stability, fabrication.

Language: Английский

Citations

254
A Quinoxaline‐Based D–A Copolymer Donor Achieving 17.62% Efficiency of Organic Solar Cells DOI
Can Zhu, Lei Meng, Jinyuan Zhang

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(23)

Published: April 29, 2021

Abstract Side‐chain engineering has been an effective strategy in tuning electronic energy levels, intermolecular interaction, and aggregation morphology of organic photovoltaic materials, which is very important for improving the power conversion efficiency (PCE) solar cells (OSCs). In this work, two D–A copolymers, PBQ5 PBQ6, are designed synthesized based on bithienyl‐benzodithiophene (BDTT) as donor (D) unit, difluoroquinoxaline (DFQ) with different side chains acceptor (A) thiophene π‐bridges. PBQ6 alkyl‐substituted fluorothiophene DFQ units possesses redshifted absorption, stronger higher hole mobility than alkyl units. The blend film Y6 shows balanced hole/electron mobilities, less charge carrier recombination, more favorable morphology. Therefore, OSC PBQ6:Y6 achieves a PCE high 17.62% fill factor 77.91%, significantly (15.55%) PBQ5:Y6‐based OSC. by far one highest efficiencies binary OSCs polymer acceptor.

Language: Английский

Citations

194
Near‐Infrared Materials: The Turning Point of Organic Photovoltaics DOI Creative Commons
Dong Meng, Ran Zheng, Yepin Zhao

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(10)

Published: Oct. 28, 2021

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

Language: Английский

Citations

194
A New Conjugated Polymer that Enables the Integration of Photovoltaic and Light‐Emitting Functions in One Device DOI
Ye Xu, Yong Cui, Huifeng Yao

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(22)

Published: April 25, 2021

Abstract Exploring the intriguing bifunctional nature of organic semiconductors and investigating feasibility fabricating devices are great significance in realizing various applications with one device. Here, design a new wide‐bandgap polymer named PBQx‐TCl (optical bandgap 2.05 eV) is reported, its photovoltaic light‐emitting studied. By nonfullerene acceptors BTA3 BTP‐eC9, it shown that exhibit high power conversion efficiency (PCE) 18.0% under air mass 1.5G illumination conditions an outstanding PCE 28.5% for 1 cm 2 device 26.0% 10 from 1000 lux diode. In addition, PBQx‐TCl:BTA3‐based also demonstrates moderate diode performance electroluminescence external quantum approaching 0.2% broad emission range 630–1000 nm. These results suggest PBQx‐TCl‐based potential functions.

Language: Английский

Citations

181
Polythiophenes for organic solar cells with efficiency surpassing 17% DOI Creative Commons

Xiyue Yuan,

Yunli Zhao,

Dongsheng Xie

et al.

Joule, Journal Year: 2022, Volume and Issue: 6(3), P. 647 - 661

Published: March 1, 2022

Language: Английский

Citations

163
Over 17% Efficiency Binary Organic Solar Cells with Photoresponses Reaching 1000 nm Enabled by Selenophene-Fused Nonfullerene Acceptors DOI
Qi Feng, Kui Jiang, Francis Lin

et al.

ACS Energy Letters, Journal Year: 2020, Volume and Issue: 6(1), P. 9 - 15

Published: Nov. 20, 2020

Nonfullerene acceptors (NFAs) have played an important role in the development of organic solar cells. However, optical absorption most NFAs is limited within 600–900 nm, prohibiting further improvement short-circuit current density (Jsc). To alleviate this problem, a fused-ring π-core BzS was designed by combining weakly electron-withdrawing benzotriazole (Bz) and strongly electron-donating selenophene together. Besides, length N-alkyl chain on Bz moiety engineered to tune morphology, affording two mBzS-4F EHBzS-4F. Both possess edge approaching 1000 as resulted from enhanced intramolecular charge transfer conjunction with efficient intra- intermolecular interactions. Binary photovoltaic devices based PM6:mBzS-4F showed power conversion efficiency 17.02% very high Jsc 27.72 mA/cm2 low energy loss 0.446 eV. This work provides strategy for future design NIR-responsive materials.

Language: Английский

Citations

160
Challenges and recent advances in photodiodes-based organic photodetectors DOI
Junwei Liu, Mengyuan Gao,

Juhee Kim

et al.

Materials Today, Journal Year: 2021, Volume and Issue: 51, P. 475 - 503

Published: Sept. 11, 2021

Language: Английский

Citations

157
Solution‐Processed Polymer Solar Cells with over 17% Efficiency Enabled by an Iridium Complexation Approach DOI
Tao Wang, Rui Sun,

Mumin Shi

et al.

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(22)

Published: April 21, 2020

Abstract The commercially available PM6 as donor materials are used widely in highly efficient nonfullerene polymer solar cells (PSCs). In this work, different concentrations of iridium (Ir) complexes (0, 0.5, 1, 2.5, and 5 mol%) incorporated carefully into the conjugated backbone (PM6‐Ir0), a set π‐conjugated donors (named PM6‐Ir0.5, PM6‐Ir1, PM6‐Ir2.5, PM6‐Ir5) synthesized characterized. It is demonstrated that approach can rationally modify molecular aggregations donors, effectively controlling corresponding blend morphology physical mechanisms, finally improve photovoltaic performance PM6‐Ir x ‐based PSCs. Among them, best device based on PM6‐Ir1:Y6 (1:1.2, w/w) exhibits outstanding power conversion efficiencies (PCEs) 17.24% tested at Wuhan University 17.32% Institute Chemistry, Chinese Academy Sciences well certified PCE 16.70%, which much higher than control PM6‐Ir0:Y6 (15.39%). This work affords an effective for further break through reported champion binary

Language: Английский

Citations

142