Abstract:

Due to the low-cost and simple fabrication processes, organometal trihalide perovskite solar cells(PSCs) have garnered recent interest in the scientific community, and their power conversion efficiencies have been rapidly increased to the levels comparable to traditional crystalline Si solar cells. However, the low stability of PSCs has obviously limited their commercialization. Among various kinds of PSCs, the one using carbon electrode(C-PSCs) as hole extraction electrode has shown the promise to address the stability issues because unstable hole transport materials were removed, while the carbon electrode is highly stable. Since first reported in 2013, much progress has been made on C-PSCs with the efficiency rapidly increasing from 6.6% to 15.9%. Herein, we have systematically reviewed the recent developments in C-PSCs, including device structure and working principles, progress on different parts of C-PSCs(electron transporting layer, perovskite layer and carbon electrode), and the issues needed to be addressed.

Key words: perovskite, carbon electrode, electron transporting layer, device structure, working principle