Terpolymerization and Regioisomerization Strategy to Construct Efficient Terpolymer Donors Enabling High‐Performance Organic Solar Cells DOI

Fuliang Cheng,

Yongjie Cui, Feng Ding

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(30)

Опубликована: Апрель 19, 2023

Terpolymerization and regioisomerization strategies are combined to develop novel polymer donors overcome the difficulty of improving organic solar cells (OSCs) performance. Two isomeric units, bis(2-hexyldecyl)-2,5-bis(4-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTO) bis(2-hexyldecyl) 2,5-bis(3-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTI), obtained incorporated into PM6 backbone via random copolymerization form a series terpolymers. Interestingly, it is found that different chlorine (Cl) substituent positions can significantly change molecular planarity electrostatic potential (ESP) owing steric hindrance effect heavy Cl atom, which leads aggregation behaviors miscibility between donor acceptor. The TTO unit features higher number multiple S···O non-covalent interactions, more positive ESP, fewer isomer structures than TTI. As result, terpolymer PM6-TTO-10 exhibits much better coplanarity, stronger crystallinity, obvious behavior, proper phase separation in blend film, conducive efficient exciton dissociation charge transfer. Consequently, PM6-TTO-10:BTP-eC9-based OSCs achieve champion power conversion efficiency 18.37% with an outstanding fill factor 79.97%, among highest values reported for terpolymer-based OSCs. This work demonstrates terpolymerization approach achieving high-performance donors.

Язык: Английский

Mechanism study on organic ternary photovoltaics with 18.3% certified efficiency: from molecule to device DOI

Yaokai Li,

Yuan Guo, Zeng Chen

и другие.

Energy & Environmental Science, Год журнала: 2022, Номер 15(2), С. 855 - 865

Опубликована: Янв. 1, 2022

Our work presents a study on the working mechanism of ternary organic photovoltaic devices based non-fullerene acceptors, focusing composition-dependent optoelectronic property variations in blend films and devices.

Язык: Английский

Процитировано

87
Double Asymmetric Core Optimizes Crystal Packing to Enable Selenophene‐based Acceptor with Over 18 % Efficiency in Binary Organic Solar Cells DOI
Xin Zhao, Qiaoshi An, Heng Zhang

и другие.

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(10)

Опубликована: Янв. 2, 2023

Side-chain tailoring is a promising method to optimize the performance of organic solar cells (OSCs). However, asymmetric alkyl chain-based small molecular acceptors (SMAs) are still difficult afford. Herein, we adopted novel n-nonyl/undecyl substitution strategy and synthesized two A-D1 A'D2 -A double isomeric SMAs with selenophene-based central core for OSCs. Crystallographic analysis indicates that AYT9Se11-Cl forms more compact order intermolecular packing compared AYT11Se9-Cl, which contributed higher electron mobility in neat film. Moreover, PM6 : blend film shows better morphology appropriate phase separation distinct face-on orientation than AYT11Se9-Cl. The OSCs obtain superior PCE 18.12 % AYT11Se9-Cl (17.52 %), best efficiency selenium-incorporated binary BHJ Our findings elucidate chains precisely modulates crystal enhances photovoltaic selenophene-incorporated SMAs.

Язык: Английский

Процитировано

79
Random Terpolymer Enabling High‐Efficiency Organic Solar Cells Processed by Nonhalogenated Solvent with a Low Nonradiative Energy Loss DOI
Hao Lu,

Hang Wang,

Guangliu Ran

и другие.

Advanced Functional Materials, Год журнала: 2022, Номер 32(34)

Опубликована: Июнь 15, 2022

Abstract Three terpolymer donors (PL1, PL2, and PL3) employing repeating units of two popular photovoltaic polymers PM6 D18 are synthesized by random copolymerization. The terpolymers can reduce the regio‐regularity polymer backbones endow them with much‐enhanced solubility in nonhalogenated solvents such as o ‐xylene. Furthermore, along appearance temperature‐dependent aggregation behavior, indicating adaptability for fabricating organic solar cells (OSCs) eco‐friendly solvent processing. Among them, PL1‐based OSCs display higher more balanced hole electron mobilities, longer charge separation exciton lifetime, better dissociation collection capabilities than parent (PM6 D18) based ones. A power conversion efficiency 18.14% a very low energy loss is achieved on PL1, which much that (15.16%) (16.18%). result provides an effective way to realize high‐performance processing donor materials.

Язык: Английский

Процитировано

76
Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17% DOI
Jianghao Jin,

Qiao Wang,

Kaige Ma

и другие.

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Язык: Английский

Процитировано

74
Terpolymerization and Regioisomerization Strategy to Construct Efficient Terpolymer Donors Enabling High‐Performance Organic Solar Cells DOI

Fuliang Cheng,

Yongjie Cui, Feng Ding

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(30)

Опубликована: Апрель 19, 2023

Terpolymerization and regioisomerization strategies are combined to develop novel polymer donors overcome the difficulty of improving organic solar cells (OSCs) performance. Two isomeric units, bis(2-hexyldecyl)-2,5-bis(4-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTO) bis(2-hexyldecyl) 2,5-bis(3-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTI), obtained incorporated into PM6 backbone via random copolymerization form a series terpolymers. Interestingly, it is found that different chlorine (Cl) substituent positions can significantly change molecular planarity electrostatic potential (ESP) owing steric hindrance effect heavy Cl atom, which leads aggregation behaviors miscibility between donor acceptor. The TTO unit features higher number multiple S···O non-covalent interactions, more positive ESP, fewer isomer structures than TTI. As result, terpolymer PM6-TTO-10 exhibits much better coplanarity, stronger crystallinity, obvious behavior, proper phase separation in blend film, conducive efficient exciton dissociation charge transfer. Consequently, PM6-TTO-10:BTP-eC9-based OSCs achieve champion power conversion efficiency 18.37% with an outstanding fill factor 79.97%, among highest values reported for terpolymer-based OSCs. This work demonstrates terpolymerization approach achieving high-performance donors.

Язык: Английский

Процитировано

64