Issue 17, 2015

Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

Abstract

Solution-processed organometal trihalide-based perovskites have attracted attention in the field of solar energy due to their high absorption and low temperature fabrication. We demonstrated the droplet-assisted two-step process of spin coating lead iodide (PbI2) followed by spray coating methylammonium iodide (CH3NH3I) to prepare a continuous lead iodide perovskite film. A simple airbrush gun was used to control the volume of CH3NH3I, in order to attain a uniform, stoichiometric and continuous perovskite film. An insufficient or excess volume of CH3NH3I gives poor crystallinity and morphology, which gradually reduces the device performance. A power conversion efficiency (PCE) of 11.66% was achieved for 100 nm of PbI2 followed by 300 μl of CH3NH3I and annealing at 100 °C for 120 min. To address the reproducibility of the device performance, 50 devices were fabricated for statistical analysis and 80% of the devices showed the average PCE of 10–11% with reproducible JSC, VOC and FF.

Graphical abstract: Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

Supplementary files

Article information

Article type
Paper
Submitted
02 صفر 1436
Accepted
28 ربيع الثاني 1436
First published
30 ربيع الثاني 1436

J. Mater. Chem. A, 2015,3, 9257-9263

Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

K. M. Boopathi, M. Ramesh, P. Perumal, Y. Huang, C. Tsao, Y. Chen, C. Lee and C. Chu, J. Mater. Chem. A, 2015, 3, 9257 DOI: 10.1039/C4TA06392A

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