Optimizing inorganic double halide (Cs2TiI6) perovskite solar cell for different hole transport layers using solar cell capacitance software (SCAPS-ID)

Although the organic-inorganic Pb-based (CH3NH3PbI3) and Sn-based (CH3NH3SnI3) perovskite solar cells (PSC) have attained higher efficiency but due to toxicity and instability, the inorganic, Ti-based (Cs2TiI6) PSC can be a potential alternative. So, the current paper focuses on determining open circuit voltage (VOC), short circuit current density (JSC), fill factor (FF), power conversion efficiency (PCE) and quantum efficiency (QE) for the inorganic PSC by changing temperature, thickness, band gaps and hole transport layers (HTLs) using solar cell capacitance software (SCAPS-ID). Three different types of Ti-based perovskite solar cell structures have been investigated by varying three types of HTL. Results yield that structure 1 (TCO/ZnO/Cs2TiI6/CdTe/Au) cedes higher PCE of 23.51 % with VOC 1.23 V, JSC 22.49 mA/cm2 and FF 84.77 % for the band gap of 1.7 eV and 500 nm thickness of the absorber layer, at 300 K temperature in comparison with other structures. The maximum efficiency of approximately 98 % has also been found for all simulated structures for the wavelength of around 360 nm.

Automated summary

This paper focuses on determining the key parameters of inorganic Ti-based (Cs2TiI6) perovskite solar cells (PSC) by using solar cell capacitance software (SCAPS-ID). The results show that the structure 1 (TCO/ZnO/Cs2TiI6/CdTe/Au) achieves the highest power conversion efficiency (PCE) of 23.51% with a band gap of 1.7 eV and a thickness of 500 nm at 300 K temperature. The maximum efficiency of approximately 98% is found for all simulated structures at a wavelength around 360 nm.