Acidochromic organic photovoltaic integrated device
Journal article, 2023
Tremendous efforts have been devoted to boosting the power conversion efficiency (PCE) of organic solar cells (OSCs) via the introduction of cathode interlayers (CILs). However, CIL materials have limited diversity and the development of multifunctional devices is largely neglected. Herein, an acidochromic organic photovoltaic integrated device is firstly proposed by introducing an acid-sensitive stimulating-reaction organic molecule as both the CIL of OSCs and the sensor of monitoring environmental acidity. The oxazolidine unit of acidochromic molecule can form a ring-opening structure after acid treatment, resulting in the remarkable color change with the direct reflection of pH value of ecological environment. The additive-free PM6:Y6 OSCs using the acidochromic molecule as the CIL achieve an excellent PCE of above 15.29 %, which is 47 % higher than that of the control device. The PCE can even maintain above 92 % after treating CIL with various strong acids (pH = 1). Moreover, the color of acidified films and the degraded performance of acidified OSCs can be easily restored by alkaline treatment. The successful application of CIL in other highly efficient photovoltaic systems proves its good universality. This work triggers the promising application of acidochromic molecules in solar cells as CIL with the additional function of recognition of acid environment.
Acidochromic
Organic solar cell
Acidification
Integrated device
Ring-opening reaction
Author
Yufei Wang
Jinan University
Qiaonan Chen
State Key Laboratory of Supramolecular Structure and Materials
Jinan University
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Zhe Liu
Southeast University
Jinan University
Feng Yu
Jinan University
Wenyan Su
Xi'an University of Science and Technology
Jinan University
Zhizhao Cai
Jinan University
Wei Guan
Jinan University
Yaohui Li
Jinan University
Lan Sheng
State Key Laboratory of Supramolecular Structure and Materials
Zhengjian Qi
Southeast University
Ergang Wang
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Lintao Hou
Jinan University
Chemical Engineering Journal
1385-8947 (ISSN)
Vol. 452 139479Next Generation Organic Solar Cells (OPV 2.0)
Swedish Research Council (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Swedish Research Council (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Swedish Research Council (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Understanding the fundamentals of light emitting electrochemical cells
Swedish Research Council (VR) (2019-02345), 2020-01-01 -- 2025-12-31.
Subject Categories
Polymer Chemistry
Textile, Rubber and Polymeric Materials
Other Chemistry Topics
Driving Forces
Sustainable development
Areas of Advance
Energy
DOI
10.1016/j.cej.2022.139479