High-efficiency organic solar cells processed from a halogen-free solvent system

被引：21

作者：

Su, Yueling ^{[1
]}

Ding, Zicheng ^{[1
]}

Zhang, Rui ^{[2
]}

Tang, Weibing ^{[1
]}

Huang, Wenliang ^{[1
]}

Wang, Zhichao ^{[1
]}

Zhao, Kui ^{[1
]}

Wang, Xiaochen ^{[1
]}

Liu, Shengzhong ^{[1
,3
]}

Li, Yongfang ^{[1
,4
]}

机构：

[1] Shaanxi Normal Univ, Sch Mat Sci & Engn, Key Lab Appl Surface & Colloid Chem, Shaanxi Key Lab Adv Energy Devices,Shaanxi Engn La, Xian 710119, Peoples R China

[2] Linkoping Univ, Dept Phys Chem & Biol IFM, Linkoping, Sweden

[3] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, iChEM, Dalian 116023, Peoples R China

[4] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China

来源：

SCIENCE CHINA-CHEMISTRY | 2023年 / 66卷 / 08期

基金：

中国国家自然科学基金;

关键词：

organic solar cells; small molecule acceptor; film microstructure; non-halogenated solvent; solvent engineering; OPEN-CIRCUIT VOLTAGE; MORPHOLOGY; TRANSPORT; STRATEGY;

D O I：

10.1007/s11426-023-1608-6

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The use of non-halogenated solvents for the green manufacture of high-efficiency organic solar cells (OSCs) is important for their future application. However, the power conversion efficiency (PCE) of the non-halogenated solvent processed OSCs is generally lower than their halogenated counterpart due to the poor film microstructure caused by the solubility issue. Herein, we propose a halogen-free solvent system to optimize film microstructure of the photovoltaic blend based on the polymer donor D18 and small-molecule acceptor (SMA) L8-BO towards high-efficiency OSCs. The solvent system is consisted of a main solvent carbon disulfide and an additive paraxylene, where the former ensures the good solution-processability and promotes the solution aggregation of L8-BO, and the latter can finely control the phase-separation process by selectively dissolving the SMA. This solvent combination robustly produces a high-quality active layer, i.e., the bicontinuous networks of donor and acceptor with nano-sized phase-separation and strong & pi;-& pi; stacking. With the effective charge generation, transport and collection, the resulting device from the non-halogenated solvent system shows a high PCE of 17.50%, which is comparable to that of the device prepared from the halogenated solvent chloroform (ca. 17.11%). This article proposes a new strategy for the green fabrication of high-efficiency OSCs to accelerate their industrialization.

引用

页码：2380 / 2388

页数：9

共 56 条

[1] Enhancing Photon Utilization Efficiency for High-Performance Organic Photovoltaic Cells via Regulating Phase-Transition Kinetics [J].