Enhancing the stability of perovskite solar cells with a green as well as low-cost organic additive

• Just Recently, Junyou Yang and Yubo Luo from the Huazhong University of Science as well as Technology, in cooperation with Xin Li from the National University of Singapore, released an article labelled "Enhancing the stability of planar perovskite solar cells by green as well as affordable cellulose acetate butyrate" in Journal of Energy Chemistry.

Crossbreed organic-inorganic halide perovskite products are getting substantial focus due to their high optical absorption coefficient, tunable bandgap, long carrier diffusion path, and also remedy processability, which make it possible for low-cost automation. In the last decade, single-junction perovskite solar cells (PSCs) have accomplished a cutting edge power conversion efficiency (PCE) of 25.7% utilizing regular (n-i-p) structures. Nevertheless, the stability of PSCs still does not meet commercial standards.

The light-absorbing layer of PSCs is at risk to irreparable degradation because of environmental conditions such as the humidity, oxygen content, ultraviolet (UV) lighting, electrical field, and also heat. The perovskite film mainly breaks down due to the numerous defects therein, bring about nonradiative recombination in the device, and also subsequently, inferior gadget performance. As a result, developing a high-quality perovskite with less defects that can assist in service provider transportation at the user interface in between the perovskite and also cost transportation layer is of immense significance to improve the performance and tool stability.

A green and also low-cost organic additive, cellulose acetate butyrate (CAB), was used to synthesize a high-quality perovskite thin film. The enhanced perovskite film with considerably enhanced crystallinity demonstrated a nearly ten-fold-longer provider lifetime than the excellent film. In addition, the energy degree and stability of the optimized perovskite films were improved, leading to the fabrication of a maximized CAB-based tool with a champion performance of 21.5% contrasted to the control tool (18.2%). On top of that, the maximized tool might keep a first efficiency of more than 90% after aging for 3300 h at a relative humidity of 35%.