Carboxylate-Containing Wide-Bandgap Polymers for High-Voltage Non-Fullerene Organic Solar Cells

Li, Xianda1,2; Tang, Ailing2; Guo, Qing1; Guo, Xugang3; Chen, Jianhua4; Guo, Qiang1; Ji, Mengwei1,2; Meng, Yuhan1,2; Li, Xiangyu1,2; Zhou, Erjun2

2022-07-20

10.1021/acsami.2c07251

ACS Applied Materials & Interfaces   Impact Factor & Quartile

1944-8244

1944-8252

As one of the polymer modification strategies, carboxylate functionalization has proved effective in downshifting the energy levels and enhancing polymer crystallinity and aggregation. However, high-performance carboxylate-containing polymers are still limited for organic solar cells (OSCs), especially with open-circuit voltage (VOC) above 1.0 V. Herein, we utilize two carboxylate-functionalized wide-band gap (WBG) donor polymers (TTC-F and TTC-Cl) to pair with two WBG electron acceptors (BTA5 and F-BTA5) for high-voltage OSCs. Due to the deeper molecular energy levels, chlorinated polymer TTC-Cl shows higher VOC than fluorinated polymer TTC-F. Furthermore, because of the stronger aggregation in the film, the TTC-Cl-based devices attain suppressed energetic disorders and trap-assisted recombination, decreasing voltage loss and JSC loss. Finally, the TTC-Cl: F-BTA5 blend achieves a higher VOC of 1.17 V and an excellent PCE of 10.98%, one of the best results for high-voltage carboxylate-containing polymers. In addition, the TTC-Cl: BTA5 combination demonstrates the highest VOC of 1.25 V with an ultralow nonradiative energy loss of 0.17 eV. Our results indicate that the carboxylate-containing polymer donors have significant application potential for high-voltage OSCs due to reduced energy loss and improved charge transport and dissociation. Furthermore, the matched absorption spectra with the indoor light sources and low voltage loss promote these material combinations to construct high-performance indoor photovoltaics.

carboxylate functionalization benzotriazole halogenation energy loss non-fullerene acceptors

SCI ; EI

English

Corresponding

Strategic Priority Research Program of the Chinese Academy of Sciences[XDB36000000] ; National Natural Science Foundation of China (NSFC)["21875052","51873044","52073067","21774055"]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000828701500001

AMER CHEMICAL SOC

20223312579885

Carboxylation ; Crystallinity ; Energy gap ; Light sources ; Open circuit voltage ; Organic polymers ; Organic solar cells

Solar Cells:702.3 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Crystalline Solids:933.1

Web of Science

1.Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 450001, Peoples R China
2.Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, Beijing 100190, Peoples R China
3.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Yunnan Univ, Dept Chem Sci & Technol, Kunming 650091, Peoples R China

Li, Xianda,Tang, Ailing,Guo, Qing,et al. Carboxylate-Containing Wide-Bandgap Polymers for High-Voltage Non-Fullerene Organic Solar Cells[J]. ACS Applied Materials & Interfaces,2022,14(28):32308-32318.

Li, Xianda.,Tang, Ailing.,Guo, Qing.,Guo, Xugang.,Chen, Jianhua.,...&Zhou, Erjun.(2022).Carboxylate-Containing Wide-Bandgap Polymers for High-Voltage Non-Fullerene Organic Solar Cells.ACS Applied Materials & Interfaces,14(28),32308-32318.

Li, Xianda,et al."Carboxylate-Containing Wide-Bandgap Polymers for High-Voltage Non-Fullerene Organic Solar Cells".ACS Applied Materials & Interfaces 14.28(2022):32308-32318.