Cu2ZnSnS4纳米晶/PEDOT:PSS复合膜的拉曼光谱和塞贝克系数

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2025-02-11 DOI:10.1016/j.tsf.2025.140618

Yevhenii Havryliuk , Volodymyr Dzhagan , Oleksandra Ivakhno-Tsehelnyk , Anatolii Karnaukhov , Julia Hann , Oleksandr Selyshchev , Dietrich R.T. Zahn

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引用次数: 0

摘要

Cu2ZnSnS4 (CZTS)，尤其是纳米晶体形式的Cu2ZnSnS4 (CZTS)，是非常有前途的薄膜太阳能电池吸收材料。最近对CZTS的研究也显示出热电（TE）特性，使这种材料在混合能量收集应用中具有吸引力。在这里，我们研究了CZTS NC与聚（3,4-乙烯二氧噻吩）聚苯乙烯磺酸盐（PEDOT:PSS）的复合材料，这是一种广泛使用的具有TE性能的导电聚合物，可能有助于改善NC薄膜固有的低导电性。我们重点研究了纯PEDOT:PSS和CZTS NCs/PEDOT:PSS复合材料在热退火或闪光灯退火（FLA）下的塞贝克系数。利用原子力显微镜研究了所得薄膜的表面形貌，同时利用拉曼光谱监测了CZTS NCs和聚合物的结构变化。与纯PEDOT:PSS膜（10-18 μV/K）或NCs膜（10-30 μV/K）相比，经FLA和热处理后的复合膜的塞贝克系数（20-200 μV/K）均有所提高。

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Raman spectra and Seebeck coefficient of Cu2ZnSnS4 nanocrystals/PEDOT:PSS composite films

Cu₂ZnSnS₄ (CZTS), especially in the form of nanocrystals (NCs), is very promising as absorber material for thin-film solar cells. Recent studies on CZTS showed thermoelectric (TE) properties as well, making this material attractive for hybrid energy harvesting applications. Here, we investigate composites of CZTS NCs with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), a widely used conductive polymer with TE properties, which potentially may help to improve the inherently low electrical conductivity of NC films. We focus on the investigation of the Seebeck coefficient of pure PEDOT:PSS and CZTS NCs/PEDOT:PSS composites subject to thermal or flash lamp annealing (FLA). The surface morphology of the obtained films was studied using atomic force microscopy, while structural changes in both the CZTS NCs and the polymer were monitored simultaneously using Raman spectroscopy. For both FLA and thermal annealing, the composite films show improved Seebeck coefficients (20–200 μV/K) compared to pure PEDOT:PSS films (10–18 μV/K) or NCs films (10–30 μV/K).

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来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.