Affiliation:
1. Department of Microelectronic Science and Engineering School of Physical Science and Technology Ningbo University Ningbo 315211 China
2. National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China
3. Department of Electronic and Information Engineering The Hong Kong Polytechnic University Kowloon Hong Kong 100872 China
4. College of Science and Technology Ningbo University Cixi 315300 China
Abstract
Perovskite solar cells (PSCs) have shown an impressive power conversion efficiency of 26.1%, while their upcoming commercialization urgently needs to solve the stability problem. Among numerous stability issues of PSCs, little attention is paid to reverse bias stability. When some cells of the module are shaded by irresistible factors, this will cause the current of the illuminated part to flow through the shaded cells as a reverse current and force them to be under reverse bias. Herein, the breakdown mechanism dominated by different reverse bias regions of a prototype electron transport layer free PSCs is distinguished. And, it is confirmed that PSCs present a thought‐provoking dynamic reverse bias (DRB) behavior and variable reverse breakdown voltage (VRB), which is essentially distinct from classic solar cells. Specifically, VRB is significantly affected by voltage scan rate, range and direction, and illumination. The underlying mechanism is explained by drift‐diffusion modeling taking into account the electric field generated by directional ion migration. The latter can hinder the movement of charge carriers and cause the observed variable VRB and DRB behavior. Predictably, the understanding of the dynamic process is crucial to establish a standard VRB measurement procedure and further promote the commercialization of PSCs.
Funder
National Natural Science Foundation of China
National Laboratory of Solid State Microstructures, Nanjing University
Ningbo Natural Science Foundation
Subject
Electrical and Electronic Engineering,Energy Engineering and Power Technology,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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