Liquid Crystalline Benzodithiophene Photovoltaic Donors Thermal Properties Modulation by Side-Chain/Terminal-Alkyl-Group Engineering

被引：0

作者：

Ding, Minggeng ^{[1
]}

Tang, Bin ^{[2
]}

Yu, Guangshui ^{[3
]}

Lu, Na ^{[3
]}

Liu, Deyu ^{[1
]}

Han, Dong ^{[1
]}

Makhmanov, Urol Kudratovich ^{[4
]}

Bao, Xichang ^{[2
]}

Sun, Mingliang ^{[1
]}

机构：

[1] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China

[2] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

[3] Qingdao Univ Sci & Technol, Sch Polymer Sci & Engn, Shandong Prov Key Lab Rubber Plast, Minist Educ,Key Lab Rubber Plast, Qingdao 266042, Peoples R China

[4] Inst Ion Plasma & Laser Technol Acad Sci Republ Uz, Tashkent 100125, Uzbekistan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2025年 / 129卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ORGANIC SOLAR-CELLS; PERFORMANCE ENHANCEMENT; MOLECULE; MORPHOLOGY;

D O I：

10.1021/acs.jpcc.4c07306

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Liquid crystalline small molecules have been proven to possess certain advantages in forming a balanced active-layer morphology. In this research, two liquid crystalline small-molecule donors (LC-SMDs) were synthesized. It is found that more flexible groups are beneficial to lowering the liquid crystal (LC) phase transition temperature. LCS6S forms liquid crystals in a relatively low-temperature range (145 degrees C-154 degrees C). LCS8S shows an even lower LC temperature of 130 degrees C-150 degrees C due to its longer terminal alkyl groups. Lowering the LC temperature allows the active layer to be annealed at the LC state and is more compatible with the device fabrication requirements. Photovoltaic performance is significantly improved after the thermal annealing treatment. The device based on LCS8S:Y6 exhibits balanced crystallization and phase separation, and a higher power conversion efficiency of 10.08% is achieved. This work demonstrates that annealing at the LC state is an effective strategy for optimizing device morphology and provides new insights for controlling the LC temperature of LC-SMDs.

引用

页码：4345 / 4353

页数：9

共 33 条

[1] Inganas O., Organic photovoltaics over three decades, Adv. Mater., 30, 35, (2018)
[2] Zheng Y., Zhang S., Tok J.B.-H., Bao Z., Molecular design of stretchable polymer semiconductors: current progress and future directions, J. Am. Chem. Soc., 144, 11, pp. 4699-4715, (2022)
[3] Krebs F.C., Espinosa N., Hosel M., Sondergaard R.R., Jorgensen M., 25th anniversary article: rise to power-OPV-based solar parks, Adv. Mater., 26, 1, pp. 29-39, (2014)
[4] Zhang G., Lin F.R., Qi F., Heumuller T., Distler A., Egelhaaf H.-J., Li N., Chow P.C., Brabec C.J., Jen A.K.-Y., Renewed prospects for organic photovoltaics, Chem. Rev., 122, 18, pp. 14180-14274, (2022)
[5] Pang B., Liao C., Xu X., Yu L., Li R., Peng Q., Benzo [d] thiazole based wide bandgap donor polymers enable 19.54% efficiency organic solar cells along with desirable batch-to-batch reproducibility and general applicability, Adv. Mater., 35, 21, (2023)
[6] He C., Pan Y., Ouyang Y., Shen Q., Gao Y., Yan K., Fang J., Chen Y., Ma C.-Q., Min J., Manipulating the D: A interfacial energetics and intermolecular packing for 19.2% efficiency organic photovoltaics, Energy Environ. Sci., 15, 6, pp. 2537-2544, (2022)
[7] Zhu L., Zhang M., Xu J., Li C., Yan J., Zhou G., Zhong W., Hao T., Song J., Xue X., Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology, Nat. Mater., 21, 6, pp. 656-663, (2022)
[8] Sun R., Wu Y., Yang X., Gao Y., Chen Z., Li K., Qiao J., Wang T., Guo J., Liu C., Single-junction organic solar cells with 19.17% efficiency enabled by introducing one asymmetric guest acceptor, Adv. Mater., 34, 26, (2022)
[9] Yuan J., Zhang Y., Zhou L., Zhang G., Yip H.-L., Lau T.-K., Lu X., Zhu C., Peng H., Johnson P.A., Single-junction organic solar cell with over 15% efficiency using fused-ring acceptor with electron-deficient core, Joule, 3, 4, pp. 1140-1151, (2019)
[10] Li C., Zhou J., Song J., Xu J., Zhang H., Zhang X., Guo J., Zhu L., Wei D., Han G., Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells, Nat. Energy, 6, 6, pp. 605-613, (2021)

← 1 2 3 4 →