Ingenious and Multifucntional Synthesis Approach of In:CuCrO2 nanoparticles for Highly Performed Perovskite Solar Cells

Abstract

When there is no clear study of doped ternary metal oxide for efficient hole transport layers (HTL), we propose the ingenious and multifunctional synthesis approach of In doped CuCrO2 nanoparticles (NPs) HTL including simplifying the synthesis requirements, enabling doping and achievement treatment-free HTLs. To be more specific, we demonstrate an azeotropic promoted approach (APA) to synthesize In doped CuCrO2 nanoparticles (NPs) [1]. Remarkably, compared with the conventional method for synthesizing CuCrO2 NPs, the reaction time is dramatically shortened by 90% and the calcination temperature is lowered by one-third, which not only promote the high throughput production but also reduce power consumption and cost in synthesis. Equally important, we successfully dope Indium into CuCrO2, which is fundamentally difficult to low temperature process. The In doping offers less d-d transition of Cr3+ and p-type doping characteristics for improving the transmittance and conductivity of the hole transport layer (HTL) respectively. Interestingly, the In doped CuCrO2 HTL with these improvements can be achieved by simple ambient condition process and exhibits thermal stability up to 200 oC, which is beneficial for realizing highly performed perovskite solar cells (PSCs). Our results show that PSCs with the power conversion efficiency (PCE) of 20.54 % has been achieved with higher short-circuit current density (Jsc) and fill factor (FF) than that of the control PSCs with pristine CuCrO2 NPs. Meanwhile, the devices show good repeatability and photostability. Consequently, we demonstrate an effective approach for realizing efficient HTL from the synthesis of material all the way to film formation featuring with substantial simplification of in synthesis conditions of In doping CuCrO2 NPs to treatment-free high-quality film process for favoring the practical applications of highly performed PCSs.