title: Charge generation in polymer-fullerene bulk-heterojunction solar cells.
abstract: Charge generation in organic solar cells is a fundamental yet heavily debated issue. This article gives a balanced review of different mechanisms proposed to explain efficient charge generation in polymer-fullerene bulk-heterojunction solar cells. We discuss the effect of charge-transfer states, excess energy, external electric field, temperature, disorder of the materials, and delocalisation of the charge carriers on charge generation. Although a general consensus has not been reached yet, recent findings, based on both steady-state and transient measurements, have significantly advanced our understanding of this process.
authors.affiliation: Biomolecular and Organic Electronics, IFM and Center of Organic Electronics, Linköping University, Linköping SE-581 83, Sweden. fenga@ifm.liu.se ois@ifm.liu.se.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Olle
authors.initials: O
authors.lastname: Inganäs