New Horizons for Perovskite Solar Cells Employing DNA‐CTMA as the Hole‐Transporting Material

Abstract

We investigate solution‐processed low‐temperature lead‐halide perovskite solar cells employing deoxyribose nucleic acid (DNA)–hexadecyl trimethyl ammonium chloride (CTMA) as the hole‐transport layer and (6,6)‐phenyl C 61 ‐butyric acid methyl ester (PCBM) as electron‐acceptor layer in an inverted p–i–n device configuration. The perovskite solar cells utilizing a bio‐based charge‐transport layer demonstrate power conversion efficiency values of 15.86 %, with short‐circuit current density of 20.85 mA cm −2 , open circuit voltage of 1.04 V, and fill factor of 73.15 %, and improved lifetime. DNA‐based devices maintained above 85 % of the initial efficiency after 50 days in air.