The study of hybrid solar cells with enhance performance based on heterojunction improvement

Abstract

Interface improvement of hybrid solar cells (HSCs) by using the cheap method via nitric acid solution to grow thin silicon dioxide between the silicon nanowires (SiNWs) and PEDOT:PSS was performed The power conversion efficiency (PCE) of HSCs without applying surface treatment was 10 06% open voltage (Voc) of 0 526V current density of 32 79 mA/cm2 After exploiting surface treatment by immersing 300 nm Si nanowires (SiNWs) into 16 25% of HNO3 solutions the tremendous enhancement on the performance of SiNWs/PEDOT:PSS based HSCs with PCE of 12 41% Voc of 0 546V current density of 36 36 mA/cm2 fill factor of 62 5% was demonstrated These results reveal that the silicon dioxide would eliminate the defects and dangling bonds appearing in SiNWs and decrease the interface recombination to create the well-established p-n junction In addition the results elucidate that this facile interfacial treatment could enhance the open voltage remarkably as well as reach the superior PCE

Date of Award	2019
Original language	English
Supervisor	Chia-Yun Chen (Supervisor)