Strategy for Enhancing the CdTe Thin Film Solar Cell Performance by Solution-Based CuCl Doping

IF 3.7 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2025-11-01 Epub Date: 2025-09-10 DOI:10.1109/JPHOTOV.2025.3604860

Yunpu Tai;Xin Zhang;Lei Liu;Guomei Liu;Banghua Liu;Fu You;Jingquan Zhang;Lili Wu;Chebotareva Alla;Youpin Gong;Guanggen Zeng

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Abstract

Due to the excellent optical and electrical properties, CuCl is emerging as a promising material for enhancing the efficiency of CdTe solar cells. In this work, we present a low-cost, solution-based method for CuCl doping, which not only significantly reduces Cu dosage but also enhances the efficiency of Cu incorporation compared to traditional deposition techniques that are often costly and time-consuming. When CuCl was applied to a device structured as FTO/MZO/CdS/CdSe/CdTe, the experiments revealed that optimal efficiency was achieved with a CuCl volume of 300 μL and an annealing temperature of 280°C. This configuration resulted in an impressive efficiency of 17.3% (cell area = 0.24 cm²) without the use of an antireflection coating, representing nearly a 40% increase over the control cell's efficiency of 12.38% . The observed improvements can be attributed to an increase in carrier concentration and a reduction in the back contact barrier, which collectively lead to a remarkable short-circuit current density of 30.3 mA/cm², nearing the highest level reported for Cu-doped devices in the literature.

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溶液型CuCl掺杂提高CdTe薄膜太阳能电池性能的策略

由于其优异的光学和电学性能，CuCl正成为提高CdTe太阳能电池效率的一种有前景的材料。在这项工作中，我们提出了一种低成本的、基于溶液的CuCl掺杂方法，与传统的昂贵和耗时的沉积技术相比，该方法不仅显著减少了Cu的用量，而且提高了Cu掺杂的效率。当CuCl应用于FTO/MZO/CdS/CdSe/CdTe结构器件时，当CuCl体积为300 μL、退火温度为280℃时，效率达到最佳。在不使用增透涂层的情况下，这种配置产生了17.3%（电池面积= 0.24 cm2）的令人印象深刻的效率，比控制电池的12.38%的效率提高了近40%。所观察到的改进可归因于载流子浓度的增加和背面接触势垒的减少，这共同导致了30.3 mA/cm2的显着短路电流密度，接近文献中报道的cu掺杂器件的最高水平。

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来源期刊

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.