Perovskite solar cells (PSC) have reached a record efficiency of up to 25.2 % in a matter of few years. This has spawned a lot of interest in investigating the commercial scalability of the perovskites by reducing the cost. Carbon can act as a cheaper alternative to gold and aluminium to act as counter electrode. In the present study, we have tuned the perovskite layer by the addition of FA (Formamidinium) and Cs (Cesium) through compositional engineering. The optimized configuration of perovskite was then utilized in carbon monolithic electrode stack to form a carbon-based perovskite solar cell. Emphasis is more on the performance of these carbon-based PSC. Three batches of carbon-based PSC were prepared with two-hole transport layers (P3HT, Spiro-OMeTAD) and one with no hole transport layer. All the carbon-based PSC were then subjected to EIS studies. The carbon-based HTL-Free PSC had a power conversion efficiency (PCE) of up to 9.5 % while cells with HTLs as P3HT and Spiro-OMeTAD had 8.5 % and 13.4 %, respectively. Stability wise, HTL-free devices performed exceedingly well (up to 76 days). Under endurance testing against light and heat, P3HT- based devices managed to retain 75 % of PCE after 25 h constant illumination and performed better than HTL-free and Spiro-OMeTAD based cell under thermal stress of up to 240 ℃.

钙钛矿太阳能电池（PSC）在短短几年内已达到创纪录的高达25.2％的效率。通过降低成本，人们对研究钙钛矿的商业可扩展性产生了浓厚的兴趣。碳可以作为金和铝的便宜替代品，用作对电极。在本研究中，我们通过成分工程技术通过添加FA（甲酰胺）和Cs（铯）来调整钙钛矿层。然后将钙钛矿的优化构造用于碳单片电极堆叠中，以形成基于碳的钙钛矿太阳能电池。重点更多地放在这些碳基PSC的性能上。制备了三批带有两空穴传输层（P3HT，Spiro-OMeTAD）的碳基PSC，另一批没有空穴传输层。然后将所有基于碳的PSC进行EIS研究。碳基无HTL的PSC的功率转换效率（PCE）高达9.5％，而HTL为P3HT和Spiro-OMeTAD的电池的功率转换效率分别为8.5％和13.4％。在稳定性方面，无HTL的设备表现出色（长达76天）。在对光和热的耐久测试中，基于P3HT的设备在连续照明25小时后设法保留了75％的PCE，在高达240℃的热应力下，其性能优于无HTL和Spiro-OMeTAD的电池。