Creating ultralight flexible perovskite solar cells

• In a recently-published research, 3-µm-thick readily offered parylene-C was transferred on the top of pre-cleaned glass through chemical vapor deposition (CVD) and after that the flip-over transferring (FOT) process was utilized to make certain a smooth parylene surface.

210-nm-thick Zr, Ti and Ga-doped indium oxide (ITGZO) was sputtered on parylene as transparent carrying out oxide (TCO) electrodes, as well as inverted FPSCs were then accomplished. Devices on glasses as well as parylene-F (i.e., parylene-VT4) substrates were likewise built to verify the advantages of parylene-C.

This study was released in Science China Materials led by Prof. Rui Zhu, Prof. Wei Wang and Prof. Qihuang Gong from Peking University

Checking electron microscopy (SEM) with both top and cross-sectional views was done to research the morphology distinction among perovskite films expanded on parylene-F, parylene-C as well as glass-based substrate. The perovskite films on parylene-F exhibited inadequate film protection with a number of pinholes on the film surface and revealed interfacial voids at embedded bottom user interfaces which would certainly cause charge accumulation and also induce the loss of tool performance. For perovskite films prepared on parylene-C, far better film uniformity same as glass-based films was obtained as shown by the loss of surficial pinholes as well as interfacial voids.

The ultrathin parylene-C based FPSC accomplished an impressive PCE of 20.2%, which approached that based upon FPSCs of usual density. Because of the high PCE and also light gadget weight of 6.67 g/m2 on parylene-C substrates, an exceptional power-per-weight of 30.3 W/g was realized, showing the great promise of making effective, ultrathin and ultralight solar cells with parylene-C films.