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 C61‐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.
Bio‐derived stability: Deoxyribose nucleic acid (DNA)–hexadecyl trimethyl ammonium chloride (CTMA) as the hole‐transport layer in perovskite solar cells shows enhanced device efficiency as well as improved lifetime based on a p–i–n device structure. DNA‐based devices exhibit device efficiency over 15 % higher than that of the perovskite solar cells constructed with poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and maintained above 85 % of their initial efficiency after 50 days in air.