基于刮涂法制备锂掺杂柔性铜锌锡硫硒薄膜太阳电池

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中文摘要：锂掺杂有利于提高铜锌锡硫硒薄膜太阳电池的性能.然而,传统旋涂含锂前驱体溶液的掺杂策略在前驱膜的逐层沉积过程中,由于锂的再溶解而导致大量的锂流失.在本工作中,我们通过刮涂法在柔性钼箔衬底上制备了铜锌锡硫硒薄膜,实现锂的有效掺杂,并进一步研究了锂掺杂对器件性能的影响.随着锂掺杂含量的增加,吸收层晶粒尺寸变大,这可能与硒化过程中锂-硒液相的形成有关.而且,锂可以进入铜锌锡硫硒晶格中,并在吸收层的表面积累,从而钝化缺陷,提升p-n结质量.因此,适量的锂掺杂可以提高器件的性能.此外,本工作探索了锂-钠共掺的影响.有趣的是,与Li-10％样品相比,钠元素的引入增强了吸收层拉曼光谱在328 cm-1处硫的振动信号.10％锂钠共掺可将柔性Cu2ZnSn(S,Se)4薄膜太阳电池的效率进一步从6.62％提高到7.59％.本工作提供了一种基于刮涂法、简单有效的锂掺杂策略,并证明了锂-钠共掺存在相互作用机制.

外文标题：Flexible Cu2ZnSn(S,Se)4 thin film solar cells with lithium doping via doctor blading

外文摘要：Lithium doping is beneficial for enhancing the performance of Cu2ZnSn(S,Se)4(CZTSSe)thin film solar cells.However,the conventional doping strategy of spin-coating of the precursor ink containing Li source suffers from mass loss due to Li redissolution during the layer-by-layer deposition.In this study,we report an effective Li-doping strategy for pre-paring CZTSSe thin film on a flexible Mo foil substrate via the doctor-blading approach.In addition,we investigate the effect of Li doping on device performance.The grain size becomes larger with increasing Li-doping content,which could be at-tributed to the Li-Se liquid phase formation during the sele-nization process.Moreover,lithium can enter the CZTSSe lattice,and it tends to accumulate on the surface,passivating the defects and improving the functionality of the p-n junc-tion.Thus,an appropriate Li-doping content enhances device performance.Furthermore,the strategy of codoping with Li and Na is preliminarily explored.Interestingly,the results reveal that introducing Na enhances the Raman signal of S vibration at 328 cm-1 compared with that of the 10％-Li sam-ple.The efficiency of the flexible CZTSSe solar cells is further improved to 7.59％.Thus,this work provides a simple and effective strategy for Li doping via the doctor-blading method and demonstrates the interplaying mechanism between the codoped Li and Na.

外文关键词：

Cu2ZnSn(SSe)4doctor-bladinglithium-dopingflexible solar cells

作者：

徐菡、葛思洁、王滔、顾鄂宁、林显忠

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作者单位：

Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices,State Key Laboratory of Optoelectronic Materials and Technologies,Nanotechnology Research Center,School of Materials Science and Engineering,Sun Yat-Sen University,Guangzhou 510275,China

Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education,Sun Yat-Sen University,Guangzhou 510275,China

关键词：

Cu2ZnSn(S Se)4 doctor-blading lithium-doping flexible solar cells

基金：

Basic and Applied Basic Research Projects of Guangdong Province of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science Foundationfunding from the State Key Laboratory of Optoelectronic Materials and Technologies at Sun Yat-Sen University

项目编号：

2021A1515110520620741682021M703655OEMT-2022-ZTS-08

出版年：

2024

DOI：

10.1007/s40843-023-2670-6

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(1)

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