A method has been developed to fabricate organic-inorganic hybrid heterojunction solar cells based on n-type silicon nanowire (SiNW) and poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) hybrid structures by evacuating the PEDOT:PSS solution with dip-dropping on the top of SiNWs before spin-coating (solution-evacuating). The coverage and contact interface between PEDOT:PSS and SiNW arrays can be dramatically enhanced by optimizing the solution-evacuated time. The maximum power conversion efficiency (PCE) reaches 9.22% for a solution-evacuated time of 2 min compared with 5.17% for the untreated pristine device. The improvement photovoltaic performance is mainly attributed to better organic coverage and contact with an n-type SiNW surface.
© 2014 Optical Society of America
Original Manuscript: March 19, 2014
Revised Manuscript: April 14, 2014
Manuscript Accepted: April 15, 2014
Published: May 26, 2014
Wei-Li Wang, Xian-Shao Zou, Bin Zhang, Jun Dong, Qiao-Li Niu, Yi-An Yin, and Yong Zhang, "Enhanced photovoltaic performance of organic/silicon nanowire hybrid solar cells by solution-evacuated method," Opt. Lett. 39, 3219-3222 (2014)