Flexible solar cells based on PEDOT:PSS and vertically aligned silicon structures

doi:10.18721/JPM.161.201

Flexible solar cells based on PEDOT:PSS and vertically aligned silicon structures

Physical electronics

Authors:

Vyacheslavova Ekaterina A. Uvarov Alexander V. Neplokh Vladimir V. Maksimova Alina A. Baranov Artem I. Gudovskikh Alexander S.

Abstract:

Photovoltaic properties of hybrid solar cells based on poly-(3,4 ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) and Si nanowires (SiNWs) are studied. High values of the open circuit voltage (V_OC) and external quantum efficiency (EQE) at short wavelength region obtained for planar solar cells indicate sufficient passivation properties of n-Si/PEDOT:PSS interface. A technology for filling SiNWs (6 µm in height and 1.7 µm in diameter) with PEDOT:PSS has been developed using G-coating. Compared with planar hybrid cell, SiNWs/PEDOT:PSS cell exhibit lower total reflectance (~ 12%) and higher EQE in the long wavelength region. It should be stressed that an increase in the PEDOT:PSS layer thickness by the combination of the G-coating and spin coating methods does not affect the short wavelength region of EQE. This fact is important for development of flexible solar cells based on SiNWs.