journal article·2020-09Open access

A Cost‐Effective, Aqueous‐Solution‐Processed Cathode Interlayer Based on Organosilica Nanodots for Highly Efficient and Stable Organic Solar Cells

Mengqi Cui, Dan Li, Xiaoyan Du, Na Li, Qikun Rong, Ning Li, Lingling Shui, Guofu Zhou, Xinghua Wang, Christoph J. Brabec, Li Nian

Advanced Materials· Volume 32· Issue 38

Abstract

Abstract The performance and industrial viability of organic photovoltaics are strongly influenced by the functionality and stability of interface layers. Many of the interface materials most commonly used in the lab are limited in their operational stability or their materials cost and are frequently not transferred toward large‐scale production and industrial applications. In this work, an advanced aqueous‐solution‐processed cathode interface layer is demonstrated based on cost‐effective organosilica nanodots (OSiNDs) synthesized via a simple one‐step hydrothermal reaction. Compared to the interface layers optimized for inverted organic solar cells (i‐OSCs), the OSiNDs cathode interlayer shows improved charge carrier extraction and excellent operational stability for various model photoactive systems, achieving a remarkably high power conversion efficiency up to 17.15%. More importantly, the OSiNDs’ interlayer is extremely stable under thermal stress or photoillumination (UV and AM 1.5G) and undergoes no photochemical reaction with the photoactive materials used. As a result, the operational stability of inverted OSCs under continuous 1 sun illumination (AM 1.5G, 100 mW cm−2) is significantly improved by replacing the commonly used ZnO interlayer with OSiND‐based interfaces.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 P. R. China

College of Chemistry Jilin University Qianjin Street 2699 Changchun 130012 P. R. China

Institute of Materials for Electronics and Energy Technology (i‐MEET) Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Erlangen 91058 Germany

Helmholtz Institute Erlangen‐Nürnberg for Renewable Energy (HI ERN) Immerwahrstrasse 2 Erlangen 91058 Germany

School of Information and Optoelectronic Science and Engineering South China Normal University Guangzhou 510006 P. R. China

National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou 450002 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province · Higher Education Discipline Innovation Project · Solar Technologies go Hybrid · Deutsche Forschungsgemeinschaft

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