In this work, perovskite planar solar cells were fabricated on corning substrates with the structure as follows: the first layer made of tantalum-doped tin oxide as transparent contact material, followed by sputtering niobium-doped titanium oxide as the compact electron transport layer; covered with perovskite CH3NH3PbI3 as the light harvester by combination between spin-coating and dipping methods; CuSCN was evaporated as the hole transport layer; the final thin Al/Ag electrodes were deposited. | Communications in Physics, Vol. 27, No. 2 (2017), pp. 121-130 DOI: FABRICATION OF ORGANOLEAD IODIDE PEROVSKITE SOLAR CELLS WITH NIOBIUM-DOPED TITANIUM DIOXIDE AS COMPACT LAYER NGUYEN TRAN THUAT1,† BUI BAO THOA2 , NGUYEN BAO TRAN2 , NGUYEN MINH TU1 , NGUYEN NGOC MINH1 , HOANG NGOC LAM HUONG1 , PHAM THU TRANG3 , PHAN VU THI VAN3 , TRUONG THANH TU1 AND DANG TUAN LINH1 1 Nano and Energy Center, VNU University of Science 2 Department of Advanced Materials Science and Nanotechnology, University of Science and Technology of Hanoi 3 Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology † E-mail: thuatnt@ Received 17 May 2017 Accepted for publication 16 June 2017 Published 30 June 2017 Abstract. Organometal halide perovskite materials have shown high potential as light absorbers for photovoltaic applications. In this work, perovskite planar solar cells were fabricated on corning substrates with the structure as follows: the first layer made of tantalum-doped tin oxide as transparent contact material, followed by sputtering niobium-doped titanium oxide as the compact electron transport layer; covered with perovskite CH3 NH3 PbI3 as the light harvester by combination between spin-coating and dipping methods; CuSCN was evaporated as the hole transport layer; the final thin Al/Ag electrodes were deposited. This configuration is shortly described as Al/TTO/NTO/CH3 NH3 PbI3 /CuSCN/Ag. Such heterojunctions are expected to be suitable for the development of efficient hybrid solar cells. The fabricated cells were measured under the air mass illumination condition showed the rectification effect and exhibited a power conversion efficiency of with a open circuit voltage of mV a short circuit current of mA/cm2 , and a form factor of 37%. The power conversion efficiency will be further optimized in near future. Keywords: perovskite, CH3 NH3 PbI3 , solar cells, NTO, TTO, .
