ENHANCED PERFORMANCE OF TWO-STEP DEPOSITED CSPBBR3 PEROVSKITE SOLAR CELLS BY OPTIMIZED SNO2 ELECTRON TRANSPORT LAYER

• Main Author: Nur Anggraini, Putri
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87347
• Institution: Institut Teknologi Bandung

CsPbBr3 is an inorganic perovskite material that exhibits excellent both electrical and optical properties. Additionally, its superior stability compared to other perovskite materials under a moist, elevated temperature and light conditions makes CsPbBr3 an ideal candidate as a light absorbing material for solar cell device. In this study, CsPbBr3 perovskite solar cells (PSC) were fabricated using a two-step spin coating method, a simple and efficient approach in preparing the perovskite layer by a single cycle deposition of a high concentration CsBr precursor solution onto a PbBr2 layer. To enhance the performance of the PSC, SnO2 as an electron transport material was optimized by varying the solvent volume in SnO2 preparation. The results show that the CsPbBr3 perovskite layer deposited onto the optimized SnO2 layer has a dense and compact crystal structure with the closely free pinholes. The ????????? characterization of the optimized CsPbBr3 PSC under an illumination at 100 mW cm-2 intensity exhibited improved photovoltaic performance with a photoconversion efficiency of 6.41%, a fill factor of 77.8%, an open-circuit voltage of 1.32 V, and a short-circuit current density of 6.26 mA cm-2. Furthermore, the performance of the cells remained stable over 30 days storage under controlled condition at 20 ? and 30% relative humidity. These results confirm that the optimized solvent volume in the SnO2 synthesis process can significantly influence the performance of SnO2 as an electron transport material thereby improving the performance of two-step deposited CsPbBr3 PSC devices. Keywords: CsPbBr3, perovskite, solar cell, solvent, two-step spin coating.