薄膜太阳能电池用Cu2PdSnSe4和Cu2PdSn(S,Se)4钯取代Kesterite纳米材料

IF 6.5 Q2 CHEMISTRY, PHYSICAL
ACS Materials Au Pub Date : 2025-02-11 eCollection Date: 2025-05-14 DOI:10.1021/acsmaterialsau.4c00129
Kelechi Nwambaekwe, Sodiq Yussuf, Ziyanda Tshobeni, Chinwe Ikpo, Jaymi January, Meleskow Cox, Precious Ekwere, Shimelis Admassie, Xinwen Peng, Emmanuel Iwuoha
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引用次数: 0

摘要

凯斯特石作为太阳能电池发展的可持续吸收材料正在得到深入研究。然而,锌和铜等元素表现出反位缺陷,作为电荷陷阱和重组中心,影响kesterite太阳能电池的光吸收和载流子传输效率。用其他金属取代锌或铜是改善硅钙石光伏性能的策略之一。采用改进的溶剂热(多元醇)微波合成方法制备了Cu2PdSnSe4 (CPTSe)和Cu2PdSn(S,Se)4 (CPTSSe) kesterite纳米颗粒(含Pd代替Zn)并进行了光伏化研究。所制得的CPTSe和CPTSSe具有多分散的方形kesterite晶体结构,平均晶粒尺寸分别为22 nm和17 nm。对小角度x射线散射数据进行damif从头算分析,确定了CPTSe和CPTSSe纳米材料的形状为椭球状。紫外可见(UV-vis)光谱显示其红移吸收特性,带隙能值分别为1.13 eV (CPTSe)和1.20 eV (CPTSSe),适合用于光伏应用的光吸收材料。光致发光光谱表征证实,与Zn类似物相比,CPTSe和CPTSSe中的缺陷浓度有所衰减,这对电荷载流子输运和重组性能产生了积极影响。该材料在叠层光伏电池器件中的初步测试结果显示,功率转换效率分别为1.32% (CPTSe)和3.5% (CPTSSe)。CPTSe和基于CPTSe的光伏器件在24天后保持了约70%的平均开路电压(Voc),这比基于zn的kesterites保持的约20% Voc有了显着改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cu2PdSnSe4 and Cu2PdSn(S,Se)4 Palladium-Substituted Kesterite Nanomaterials for Thin-Film Solar Cells.

Kesterites are being studied intensively as sustainable absorber materials for solar cell development. However, elements such as Zn and Cu exhibit antisite defects that function as charge traps and recombination centers that affect the light absorption and carrier transport efficiencies of kesterite solar cells. The substitution of Zn or Cu with other metals is one of the strategies used to improve the photovoltaic performance of kesterites. This study focuses on the preparation and photovoltaics of Cu2PdSnSe4 (CPTSe) and Cu2PdSn(S,Se)4 (CPTSSe) kesterite nanoparticles (containing Pd instead of Zn) by a modified solvothermal (polyol) microwave synthesis method. The nanomaterials exhibited a tetragonal kesterite crystal structure with polydispersed morphology and average crystallite sizes of 22 and 17 nm for CPTSe and CPTSSe, respectively. DAMMIF ab initio analysis of the small-angle X-ray scattering data determined the shape of CPTSe and CPTSSe nanomaterials to be ellipsoidal. Ultraviolet-visible (UV-vis) spectroscopy revealed red-shift absorption properties, with bandgap energy values of 1.13 eV (CPTSe) and 1.20 eV (CPTSSe), thereby making them suitable light absorber materials for photovoltaic applications. Photoluminescence spectroscopy characterization confirmed the attenuation of defect concentrations in CPTSe and CPTSSe compared to the Zn analogue, which positively impacts the charge-carrier transport and recombination properties. A preliminary test of the materials in superstrate photovoltaic cell devices yielded power conversion efficiency values of 1.32% (CPTSe) and 3.5% (CPTSSe). The CPTSe- and CPTSSe-based photovoltaic devices maintained ∼70% mean open-circuit voltage (Voc), which is a significant improvement over the ∼20% V oc retained by Zn-based kesterites after 24 days.

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来源期刊
ACS Materials Au
ACS Materials Au 材料科学-
CiteScore
5.00
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期刊介绍: ACS Materials Au is an open access journal publishing letters articles reviews and perspectives describing high-quality research at the forefront of fundamental and applied research and at the interface between materials and other disciplines such as chemistry engineering and biology. Papers that showcase multidisciplinary and innovative materials research addressing global challenges are especially welcome. Areas of interest include but are not limited to:Design synthesis characterization and evaluation of forefront and emerging materialsUnderstanding structure property performance relationships and their underlying mechanismsDevelopment of materials for energy environmental biomedical electronic and catalytic applications
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