Stable Perovskite Solar Cells Using Molecularly Engineered Functionalized Oligothiophenes as Low‐Cost Hole‐Transporting Materials. Issue 26 (8th June 2021)

• Record Type: Journal Article
• Authors: Joseph, Vellaichamy; Sutanto, Albertus Adrian; Igci, Cansu; Syzgantseva, Olga A.; Jankauskas, Vygintas; Rakstys, Kasparas; Queloz, Valentin I. E.; Kanda, Hiroyuki; Huang, Ping‐Yu; Ni, Jen‐Shyang; Kinge, Sachin; Chen, Ming‐Chou; Nazeeruddin, Mohammad Khaja
• Is Part Of: Small. Volume 17:Issue 26(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-08
• Subjects: functionalized oligothiophenes -- low‐cost hole transporting material -- n‐i‐p configuration -- stable perovskite solar cells; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202100783
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Triarylamine‐substituted bithiophene (BT‐4D), terthiophene (TT‐4D), and quarterthiophene (QT‐4D) small molecules are synthesized and used as low‐cost hole‐transporting materials (HTMs) for perovskite solar cells (PSCs). The optoelectronic, electrochemical, and thermal properties of the compounds are investigated systematically. The BT‐4D, TT‐4D, and QT‐4D compounds exhibit thermal decomposition temperature over 400 °C. The n‐i‐p configured perovskite solar cells (PSCs) fabricated with BT‐4D as HTM show the maximum power conversion efficiency (PCE) of 19.34% owing to its better hole‐extracting properties and film formation compared to TT‐4D and QT‐4D, which exhibit PCE of 17% and 16%, respectively. Importantly, PSCs using BT‐4D demonstrate exceptional stability by retaining 98% of its initial PCE after 1186 h of continuous 1 sun illumination. The remarkable long‐term stability and facile synthetic procedure of BT‐4D show a great promise for efficient, stable, and low‐cost HTMs for PSCs for commercial applications. Abstract : A low‐cost thiophene‐based hole‐transporting material, triarylamine‐substituted bithiophene (BT‐4D), is used as a hole‐transporting material in perovskite solar cells with comparable photovoltaic performance to that of 2, 2, 7, 7‐tetrakis( N, N ‐di‐ p ‐methoxyphenylamine)‐9, 9‐spirobifluorene. The solar cell using BT‐4D demonstrates exceptional long‐term stability by retaining 98% of its initial power conversion efficiency after 1186 h under continuous 1‐sun illumination in an inert atmosphere.