A Multi-Electron Transporting Layer for Efficient Perovskite Solar Cells

Abstract

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/SnOx, TiO2, TiO2/SnO2, and TiO2/SnO2/SnOx. The best performance of PSC devices is found in the SnO2/SnOx 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 (Rct) and an increase in charge recombination resistance (Rrec). In addition, Rct and Rrec can be used to explain the comparable power conversion efficiency (PCE) between a PSC with a SnO2/SnOx double-layer and a PSC with a triple-layer, which is due to the compensation effect of Rct and Rrec parameters. Therefore, Rct and Rrec are good parameters to explain the efficiency enhancement in PSC. Thus, the Rct and Rrec 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.

A study on light sensitization behavior in (Mph)2CuCl4 low-dimensional hybrid material with tetrahedral units and extended absorption up to the NIR region

“…That is, 11520 Ωcm 2 (128000 * 0.09 = 11520) in the case of our solar cell [45]. Our solar cell showed a better FF (45.64%) due to this area having normalized high R 2 values, which point to low trap density, less charge recombination, and less leakage current [49][50][51]. This high R 2 is responsible for producing a J sc = 0.044 mAcm −2 even in the presence of high series resistance [48].…”

Optimization of Organic-Inorganic Perovskite Solar Cell Layers

“…Structure-based on SnO 2 exhibits better electrical parameters than that found on IGZO, TiO 2 , and ZnO. The better transparency of the SnO 2 material than other materials improves light absorption in the perovskite layer [30]. The solar cell based on SnO 2 as ETM displayed maximum J sc than other ETMs as its higher light absorption by the perovskite, which also re ects in the External Quantum E ciency, which is maximum in the 300-400 nm spectral regions.…”

Cathode Interlayer Based on Naphthalene Diimide: A Modification Strategy for Zinc-Oxide-Free Inverted Organic Solar Cells

“…The trend of R rec is well matched with the FF of the devices. The R rec is related to the recombination sites at the interface of the electrode/interlayer/active layer, where the higher value signifies a lower possibility of carriers being recombined …”