Tuning the Bandgap in Silver Bismuth Iodide Materials by Partly Substituting Bismuth with Antimony for Improved Solar Cell Performance

Huimin Zhu,Gabriel J Man,Chinnathambi Kamal,Malin B Johansson,Håkan Rensmo,Erik M J Johansson,Michael Odelius,Soham Mukherjee,Hua Wu,Axel Erbing

doi:10.1021/acsaem.0c00712

Abstract

Silver bismuth iodide (Ag-Bi-I) light absorbers are interesting candidates as lead-free and low-toxic metal-halide materials for solar cell applications. In this work, the partial exchange of bismu ...

Highlights

Lead (Pb) halide perovskite solar cells have shown a rapid development, and the record for power conversion efficiency (PCE) has recently reached 25.2%.1 This has been developed from the first publication of Pb-perovskite solar cells with a PCE of 3.8% in 20092 and the first solid-state Pb-perovskite solar cell devices with a PCE of around 10% in 2012.3,4a tandem solar cell with Pb-perovskite and silicon is a promising concept to obtain further increased efficiency
The surface morphologies of the samples were studied with scanning electron microscopy (SEM) and the images are shown in Figure 1a and b shows the AgBi2I7 samples
The surface appears homogeneous in a large range (a); there exists some pinholes between the grains, which are in the size ranging from 200 to 250 nm (b)

Summary

Introduction

Lead (Pb) halide perovskite solar cells have shown a rapid development, and the record for power conversion efficiency (PCE) has recently reached 25.2%.1 This has been developed from the first publication of Pb-perovskite solar cells with a PCE of 3.8% in 20092 and the first solid-state Pb-perovskite solar cell devices with a PCE of around 10% in 2012.3,4a tandem solar cell with Pb-perovskite and silicon is a promising concept to obtain further increased efficiency. Lead (Pb) halide perovskite solar cells have shown a rapid development, and the record for power conversion efficiency (PCE) has recently reached 25.2%.1. This has been developed from the first publication of Pb-perovskite solar cells with a PCE of 3.8% in 20092 and the first solid-state Pb-perovskite solar cell devices with a PCE of around 10% in 2012.3,4. The silicon solar cell can compensate for the absorption disadvantage of the Pb-perovskite solar cell in the near-infrared region. Living up to the expectations, the record PCE of the perovskite-silicon tandem solar cell now is 29.1%,1 which is higher than the previous record of 28% from the Oxford PV Company.[5,6].

Methods

Results

Conclusion