title: Construction of a long range p/n heterojunction with a pair of nanometre-wide continuous D/A phases.
abstract: A p/n heterojunction is the basic setup for light-electric conversion. It has been widely accepted that the ideal configuration for organic photovoltaics is formed by the joint of a pair of long-range continuous but nanometre-wide phases consisting of electron-donating (D) and -accepting (A) components, respectively. Such a p/n heterojunction can provide not only a large D/A interface essential to efficient photoinduced charge separation, but also the transportation pathways for both electrons and holes. This review article summarizes the present approaches including D-A double cables, diblock copolymers, and small molecular D-A dyads and multiads, to construct such an ideal p/n heterojunction. Each approach is introduced by a few selected representative works, with highlights on their molecular design strategies and the relationship of chemical structure-packing order-property. Such information would be useful for the next research in the field.
authors.affiliation: Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan 411105, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Dong
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Wei-Shi
authors.initials: WS
authors.lastname: Li
mesh_terms: D037741:Fullerenes / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D016566:Organoselenium Compounds / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012993:Solar Energy; D013876:Thiophenes / Q000737:chemistry
chemical_list: D037741:Fullerenes; D016566:Organoselenium Compounds; D011108:Polymers; D011145:Polyvinyls; D013876:Thiophenes; C530822:oligo(p-phenylene vinylene); C526212:poly(3-hexyl)selenophene; C066730:polythiophene; C028914:triethylene glycol; D011092:Polyethylene Glycols; D012822:Silicon Dioxide; C069837:fullerene C60