Composition engineering of Cu2ZnGexSn1-xS4 nanoparticles hole transport layer for carbon electrode-based perovskite solar cells

IF 10.7 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI:10.1039/d4ta07106a

Nian Cheng, Weiwei Li, Zhen-Yu Xiao, Han Pan, Dingshan Zheng, Wenxing Yang

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引用次数: 0

Abstract

Cu2ZnSnS4 (CZTS) and Cu2ZnGeS4 (CZGS) nanoparticles are important inorganic hole transport layers (HTLs) for carbon electrode-based perovskite solar cells (C-PSCs), however the performances of the corresponding C-PSCs are still not satisfactory, which mainly originates from the un-optimized photo-electronic properties of the pristine CZTS and CZGS nanoparticles. Herein, composition engineering via alloying CZTS and CZGS is used to optimize the photo-electronic properties of the resulting CZGxT1-xS HTLs (x = 0, 0.25, 0.50, 0.75, and 1.0), which plays a pivotal role on the performances of the C-PSCs. On one hand, the optimum CZG0.5T0.5S HTL exhibits suitable conduction band energy barrier at the perovskite/CZG0.5T0.5S interface, thus, charge carrier recombination at the perovskite/CZG0.5T0.5S interface could be effectively suppressed. On the other hand, CZG0.5T0.5S HTL exhibit much larger conductivity, which could efficiently transport the holes from perovskite to carbon electrode. Therefore, C-PSCs with the CZG0.5T0.5S HTL could demonstrate a champion power conversion efficiency of 19.76%.

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用于碳电极型过氧化物太阳能电池的 Cu2ZnGexSn1-xS4 纳米粒子空穴传输层的成分工程设计

Cu2ZnSnS4（CZTS）和Cu2ZnGeS4（CZGS）纳米粒子是碳电极型过氧化物太阳能电池（C-PSCs）的重要无机空穴传输层（HTLs），但相应的C-PSCs性能仍不尽如人意，这主要源于原始CZTS和CZGS纳米粒子的光电特性未优化。在这里，通过对 CZTS 和 CZGS 进行合金化，对所得到的 CZGxT1-xS HTLs（x = 0、0.25、0.50、0.75 和 1.0）的光电性能进行了优化，这对 C-PSC 的性能起着举足轻重的作用。一方面，最佳的 CZG0.5T0.5S HTL 在包晶/CZG0.5T0.5S 界面表现出合适的导带能垒，因此可以有效抑制电荷载流子在包晶/CZG0.5T0.5S 界面的重组。另一方面，CZG0.5T0.5S HTL 表现出更大的电导率，可以有效地将空穴从包晶石传输到碳电极。因此，采用 CZG0.5T0.5S HTL 的 C-PSC 电源转换效率高达 19.76%。

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来源期刊

Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

19.50

自引率

5.00%

发文量

1892

审稿时长

1.5 months

期刊介绍： The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.