Efficient electron/hole transport in inorganic/organic hybrid solar cells by lithium ion and molybdenum trioxide codoping

摘要: Abstract In this work, the energy level of acceptor TiO2 was successfully tuned by lithium ions and MoO3 (denoted as LiXMoO3) codoping, both electron hole transfer from donor to at interface inorganic-polymer bulk-heterojunction were enhanced. detail, investigating primary dynamics acceptor/donor photoactive bilayers, competition between hot cooling are clearly revealed. And also less energetic accompanied geminate recombination electron–hole pairs distinguished long time decays. Notably, conclusive evidences femtosecond transient absorption spectroscopy have uncovered that after doping with LiXMoO3, conduction band valence levels been elevated 0.42 0.31 eV, respectively, thus lifetimes shortened. Consequently, a notable power conversion efficiency 2.70% is achieved compared 1.76% pure TiO2/P3HT. This work demonstrates LiXMoO3 dopant can facilitate suitable alignment gain higher in simplified device architectures, without need for complicated structures.