Rapid digital spray coating of interface passivation layer under ambient conditions for enhancing Voc of carbon-based perovskite solar cells

doi:10.1016/j.jmst.2025.09.043

Abstract

Abstract: Carbon-based perovskite solar cells (C-PSCs) have garnered considerable interest for their simple fabrication process, low production cost, and superior stability. Nonetheless, C-PSCs exhibit a lower open-circuit voltage (V_OC) compared to devices with metal electrodes, which consequently leads to a relatively lower power conversion efficiency (PCE). Herein, we developed a rapid digital spray coating (RDSC) technique to prepare the passivation layer of C-PSCs. The RDSC approach, as opposed to the traditional spin-coating method, yields a more uniform modification layer, which effectively passivates the perovskite surface defects and prolongs the carrier lifetime. Consequently, the optimized C-PSCs device achieved a PCE of 20.2 %, with a V_OC of 1.16 V, which is comparable to the metal electrode-based PSCs. This research highlights the substantial potential of the RDSC technique for interface modification in the application of perovskite solar cells, offering a promising route for enhancing device performance.

Key words: Perovskite solar cells, Rapid digital spray coating, Carbon electrode, Defect passivation, Open-circuit voltage

Zhang Hongkai, Wei Yilin, Shi Dongchang, Jia Runfan, Zhang Xian, Wang Jingyi, Zhang Yue, Guan Yan, Liu Fangzhou, Zhang Yangyang, Wang Xi, Wu Cuncun, Zheng Shijian. Rapid digital spray coating of interface passivation layer under ambient conditions for enhancing V_oc of carbon-based perovskite solar cells[J]. J. Mater. Sci. Technol., 2026, 260: 106-112.

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Rapid digital spray coating of interface passivation layer under ambient conditions for enhancing V_oc of carbon-based perovskite solar cells

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