A Multi-Electron Transporting Layer for Efficient Perovskite Solar Cells

Coatings

Vasan Yarangsi¹  Kritsada Hongsith¹  Sukrit Sucharitakul¹  Surachet Phadungdhitidhada¹  Athipong Ngamjarurojana¹  Supab Choopun¹ 

[1] Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;

关键词: perovskite solar cell;    charge transfer resistance;    electrochemical impedance spectroscopy;    electron transporting layer;    multi-layer;   

DOI  :  10.3390/coatings11091020

来源: DOAJ

【 摘 要 】

In this work, a multi-electron transporting layer (ETL) for efficient perovskite solar cells is investigated. The multi-ETL consists of five conditions including SnO₂, SnO₂/SnO_x, TiO₂, TiO₂/SnO₂, and TiO₂/SnO₂/SnO_x. The best performance of PSC devices is found in the SnO₂/SnO_x double-layer and exhibits a power conversion efficiency equal to 18.39% higher than the device with a TiO₂ single-layer of 14.57%. This enhancement in efficiency can be attributed to a decrease in charge transport resistance (R_ct) and an increase in charge recombination resistance (R_rec). In addition, R_ct and R_rec can be used to explain the comparable power conversion efficiency (PCE) between a PSC with a SnO₂/SnO_x double-layer and a PSC with a triple-layer, which is due to the compensation effect of R_ct and R_rec parameters. Therefore, R_ct and R_rec are good parameters to explain the efficiency enhancement in PSC. Thus, the R_ct and R_rec from the electrochemical impedance spectroscopy (EIS) technique is an easy and alternative way to obtain information to understand and characterize the multi-ETL on PSC.

【 授权许可】

Unknown