Self-Healing Perovskite Solar Cells: Introduction, Recent Progresses and Perspective

Abstract

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) is sufficiently high for commercialization, however, the long-term stabilities of PSCs and potential Pb leakage need to be addressed seriously. Self-healing PSCs are very promising for developing long-life and flexible devices. Herein, we provide a review on self-healing PSCs and aim to contribute a valuable summary and support to the ongoing efforts devoted to this area. In the first part, the major factors affecting the stabilities of PSCs and the corresponding stability-losing mechanisms are briefly introduced, which is the groundwork for developing self-healing PSCs. The second part is a brief introduction on self-healing materials, including the key requirements, self-healing mechanisms, and the typical applications in soft electronics. With the information in the first two parts, we conduct a comprehensive review on the research of self-healing PSCs in the third part. Last but not least, the main challenges and long-term perspective for realizing the large scale utilizations of self-healing PSCs are discussed. In addition to the fields of PSCs, self-healing strategies are applicable to other flexible (opto)electronics as well. Therefore, a broad readership from varied areas of soft devices can also find interested points from this review.

Keywords

flexible devices / perovskite / self-healing materials / solar cells

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