Effect of dopants in the HTL layer on photovoltaic properties in hybrid perovskite solar cells

The performance of CH 3 NH 3 PbI 3 based perovskite materials deposited on Al-doped ZnO film is correlated with carrier extraction, surface, and film qualities of the hole transporting layers(HTLs). Changing the surface properties of HTL with both EG and triton X-100 into PEDOT: PSS in the ratio of 2:1. This shows better conductivity, good film formation, higher hole mobility, and negligible hysteresis in halide perovskite-based solar cells. In this present work, 10% of efficiency has been achieved by adding co-dopants in PEDOT: PSS layer in the Al–ZnO/CH 3 NH 3 PbI 3 /PEDOT: PSS heterostructure with a cost-effective method. Not only better hole extraction of PEDOT: PSS is observed after co-doped it with EG and triton X-100 but also higher efficiency is observed in the heterostructure.