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 139479

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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

More information

Latest update

10/24/2022