title: Piezotronic effect on the output voltage of P3HT/ZnO micro/nanowire heterojunction solar cells.
abstract: We report the first observation of piezotronic effect on the output voltage of a flexible heterojunction solar cell. The solar cell was fabricated by contacting poly(3-hexylthiophene) (P3HT) with one end of a ZnO micro/nanowire to form a p-n heterojunction on a flexible polystyrene (PS) substrate. The open-circuit voltage V(oc) of the solar cell was characterized by tuning the strain-induced polarization charges at the interface between ZnO and P3HT. The experimental data were understood based on the modification of the band structure at the p-n junction by the piezopotential, which is referred as a result of the piezotronic effect. This study not only provides an in-depth understanding about the effect but also is useful for maximizing the output of a solar cell using wurtzite structured materials.
authors.affiliation: School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Ya
authors.initials: Y
authors.lastname: Yang
authors.forename: Wenxi
authors.initials: W
authors.lastname: Guo
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yong
authors.initials: Y
authors.lastname: Ding
authors.forename: Xue
authors.initials: X
authors.lastname: Wang
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008839:Microelectrodes; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D016566:Organoselenium Compounds / Q000737:chemistry*; D010316:Particle Size; D012993:Solar Energy; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D016566:Organoselenium Compounds; C526212:poly(3-hexyl)selenophene; D015034:Zinc Oxide