Effect of ZnO film deposition methods on the photovoltaic properties of ZnO–Cu2O heterojunction devices

Interface stoichiometry control to improve device voltage and modify band alignment in ZnO/Cu2O heterojunction solar cells

“…2,3,[15][16][17][18][19][20][21][22] In this manuscript, we describe the controlled modication of ZnO/Cu 2 O heterostructures to yield stoichiometric interfaces as well as nonstoichiometric interfaces with Cu and CuO present. We also show that stoichiometric interfaces are necessary for achieving large device voltages.…”

Microstructures and Photovoltaic Properties of Zn(Al)O/Cu2O-Based Solar Cells Prepared by Spin-Coating and Electrodeposition

“…ZnO is a good electron acceptor with a hexagonal crystal system (space group P63mc) [24] as shown in Figure 1b, and has been used as an n-type semiconductor active layer for inorganic thin-film solar cells [25][26][27][28][29][30]. To improve the carrier transport in the ZnO structure, aluminum (Al) was selected in the present work for doping element at the Zn sites in the ZnO structure.…”

Optical Properties of ZnO/ZnS and ZnO/ZnTe Heterostructures for Photovoltaic Applications

“…Unfortunately, the ZnO band gap (3.4 eV) is too large for use in efficient photovoltaic devices. 13 Nonetheless, this has not prevented numerous attempts to construct photovoltaics from this material, with schemes such as n-ZnO/p-CdTe thin film heterojunctions, 14,15 ZnO/CdSe composites, 16 n-ZnO/p-Cu 2 O heterojunctions, 17,18 n-ZnO/p-Si heterostructures, 19,20 ZnO-nanocrystal/organic-polymer hybrid photovoltaics, [21][22][23][24][25][26][27][28] and ZnO-nanocolumns as electrodes for dye-sensitized photoelectrochemical cells. 29 One idea to reduce the band gap of ZnO is to stack it with another environmentally benign and abundant material, such as ZnS.…”