Spacer cation engineering in 2D hybrid perovskite

Abstract

The current energy landscape demands the development of cost-effective renewable energy technologies. In this regard hybrid perovskites have gained numerous attentions since last decade for their application in photovoltaic devices as an intrinsic absorber.[1-3] They can be easily synthesized using solution based low cost methods which is a major advantage for using hybrid perovskites. Additionally, they have excellent properties useful for photovoltaics like high optical absorption coefficient (~105 cm−1), well balanced charge transfer as well as defect tolerance. Unfortunately, this unique material possess very low formation energy and is very much prone to degrade in presence of light and moisture.[4-5] In this context 2D hybrid perovskites containing large organic cation emerged as a potential alternative.