Enhancing solar cell efficiency: lead-free double perovskite solar cells Cs2AgBiBr6 with magnesium-doped and Zn2SnO4 electron transport layer

IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-09-13 DOI:10.1007/s10971-024-06529-z
Ihtisham-ul-haq, M. I. Khan, lamia ben farhat
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Abstract

The lead-free halide double perovskite solar cell (LFHDPs) \(C{s}_{2}AgBiB{r}_{6}\) has emerged as a compelling alternative to conventional lead-based perovskites (LBPs) owing to its notable advantages in chemical stability and non-toxicity. However, due to their large indirect bandgap (Eg), \(C{s}_{2}AgBiB{r}_{6}\) solar cells exhibit low efficiency (η). To address these challenges, this study explores the doping of \(C{s}_{2}AgBiB{r}_{6}\) double perovskite with Magnesium (Mg), resulting in a reduced Eg and improved η. Mg doping not only mitigates recombination losses but also enhances charge carrier mobility and stability. Additionally, the incorporation of a \(Z{n}_{2}Sn{O}_{4}\) (ZTO) electron transport layer (ETL) enhances η and stability by facilitating rapid charge injection and electron diffusion. Excellent optical and electrical characteristics of the ZTO-based ETL make it suitable for improving the η of charge collection and light harvesting in solar cells. Importantly, the \(C{s}_{2}A{g}_{0.95}M{g}_{0.05}BiB{r}_{6}\) solar cell exhibits enhanced performance, significantly, the fabricated solar cells exhibit improved performance. The measured values include an open circuit voltage (Voc) of 0.9 V, a short circuit current density (Jsc) of 5.77 mA-cm−2, a fill factor of 0.76, and a η of 3.98%. This study not only helps to overcome film formation issues but also validates stable \(C{s}_{2}A{g}_{0.95}M{g}_{0.05}BiB{r}_{6}\) as an efficient material for solar applications. Overall, our study improves solar technologies that are friendly to the environment.

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提高太阳能电池效率:掺镁和 Zn2SnO4 电子传输层的无铅双包晶太阳能电池 Cs2AgBiBr6
无铅卤化物双包晶太阳能电池(LFHDPs)由于在化学稳定性和无毒性方面的显著优势,已成为传统铅基包晶(LBPs)的一种引人注目的替代品。然而,由于其间接带隙(Eg)较大,(C{s}_{2}AgBiB{r}_{6}\)太阳能电池的效率(η)较低。为了应对这些挑战,本研究探讨了在\(C{s}_{2}AgBiB{r}_{6}\)双包晶石中掺入镁(Mg),从而降低Eg并提高η。掺入镁不仅能减少重组损耗,还能提高电荷载流子的迁移率和稳定性。此外,通过促进快速电荷注入和电子扩散,掺入(Z{n}_{2}Sn{O}_{4})(ZTO)电子传输层(ETL)增强了η和稳定性。基于 ZTO 的电子传输层具有出色的光学和电学特性,因此适用于改善太阳能电池中电荷收集和光收集的 η。重要的是,制造出的(C{s}_{2}A{g}_{0.95}M{g}_{0.05}BiB{r}_{6})太阳能电池表现出更高的性能。测量值包括开路电压(Voc)为 0.9 V,短路电流密度(Jsc)为 5.77 mA-cm-2,填充因子为 0.76,η 为 3.98%。这项研究不仅有助于克服薄膜形成问题,还验证了稳定的 \(C{s}_{2}A{g}_{0.95}M{g}_{0.05}BiB{r}_{6}\) 是一种高效的太阳能应用材料。总之,我们的研究改进了对环境友好的太阳能技术。
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来源期刊
Journal of Sol-Gel Science and Technology
Journal of Sol-Gel Science and Technology 工程技术-材料科学:硅酸盐
CiteScore
4.70
自引率
4.00%
发文量
280
审稿时长
2.1 months
期刊介绍: The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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