Incorporation of V 2 O 5 nanorods into perovskite photodetectors as an alternative approach to enhance device performance: a step towards stability against ambient water species

• Published in: Dalton transactions : an international journal of inorganic chemistry 2020-11, Vol.49 (44), p.15788-15799
• Main Authors: Besra, Nripen, Sardar, Kausik, Maiti, Soumen, Sarkar, Pranab Kumar, Paul, Tufan, Thakur, Subhasish, Majumdar, Gautam, Chattopadhyay, Kalyan Kumar
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/D0DT03177A

Numerous reports have been made in the literature on the usability of a halide perovskite, namely methyl ammonium lead iodide (CH 3 NH 3 PbI 3 ), as a light harvesting material. Suitable optimization in material composition and synthesis has led to an improvement in device performance. However, the susceptibility of CH 3 NH 3 PbI 3 towards atmospheric water is an alarming issue which hinders its long-term application in day-to-day life. Herein, low temperature synthesized V 2 O 5 nanorods are incorporated into the CH 3 NH 3 PbI 3 matrix to facilitate carrier dynamics by interface engineering. The optimized hybrid sample exhibits a much improved and stable photo-response behaviour than the pristine building blocks. Additionally, the modified perovskite shows improved hydrophobicity in the form of small-scale surface undulations due to the incorporation of V 2 O 5 nanorods into it. This way, we have solved two problems with one single action, firstly by improving the device performance and secondly by stabilizing the sample against ambient water species.