Non-radiative recombination losses are reduced drastically by addition of adamantylammonium iodide (ADAHI) into the hole transporting layer (HTL) in a perovskite solar cell, resulting in high efficiency (∼22%), increased Voc up to 1245 mV, and enhanced electro-luminescence EQE to 2.5%.
Carbazole or phenothiazine core-based hole-transport materials are facilely accessed by an optimized synthesis-shortcut. Perovskite solar cell devices with 6–13 demonstrate PCEs of up to 17.57%.
Abstract
Fill factor (FF) deficit and stability is a primary concern with the perovskite solar cell. Resistance values and band alignment at junction interface in perovskite are causing low fill factor. Moisture sensitivity of methylammonium lead halide perovskite is causing a stability issue. We tried to solve these issues by using inorganic hole transport layer (HTL). FF is sensitive to the band offset values. We study the band alignment/band offset effect at the Perovskite /HTL junction. Inorganic material replacing Spiro-MeOTAD can enhance the stability of the device by providing an insulation from ambient. Our simulation study shows that the earth abundant p-type chalcogenide materials of SnS as HTL in perovskite is comparable to Spiro-MeOTAD efficiency.
Doping strategies for small molecule organic hole-transport materials: impacts on perovskite solar cell performance and stability
