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In this work, layered perovskite SBN was investigated in a new doped form forhole as well as electron transport layer (HTL/ETL) in perovskite solar cells.This work was targeted to conclude the effect of tin doping inlanthanum-bismuth layer SBN on optical energy band gap besides dominantelectron-hole transportation to assist in perovskite solar cell applications.Thoroughly hard ball-milled compositions Sr1-xSnxBi1.95La0.05Nb2O9 (x=0.0,0.01, 0.03, 0.05, 0.1 and 0.2) were prepared by special microwave synthesis toobtain fine (~10-60nm) mesoporous particle network of atomic levelsubstitutions. Microwave synthesis was crucial in modifying dielectric,semiconducting and optical characteristics of prepared SBN materials. The bandgap reduced in continuous manner and carrier mobility was increased by 112% formaximum tin doping. Nano particle formation assisted in raising carriermobility by bridging bigger grains through nano particles. The effect ofmacro-sized grains and nano-sized grain boundaries on carrier transport werefurther investigated in detail using impedance spectroscopy.

Hole/Electron transport layers in tin-doped SBLN nano materials for hybrid solar cells