Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells,Advanced Materials Technologies

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Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-06-09 , DOI: 10.1002/admt.202000282
Valentina Rohnacher _{1,

2} , Florian Ullrich _{2,

3} , Helge Eggers _{2,

4} , Fabian Schackmar _{2,

4} , Sebastian Hell _{1,

2} , Adriana Salazar _{2,

3} , Christian Huck ₁ , Gerardo Hernandez‐Sosa _{2,

4} , Ulrich W. Paetzold _{2,

4} , Wolfram Jaegermann _{2,

3} , Annemarie Pucci _{1,

2}

Affiliation

Solution‐processed tin oxide (SnO_x) electron transport layers demonstrate excellent performance in various optoelectronic devices and offer the ease of facile and low cost deposition by various printing techniques. The most common precursor solution for the preparation of SnO_x thin films is SnCl₂ dissolved in ethanol. In order to elucidate the mechanism of the precursor conversion at different annealing temperatures and the optoelectronic performance of the SnO_x electron transport layer, phonon and vibrational infrared and photoelectron spectroscopies as well as atomic force microscopy are used to probe the chemical, physical, and morphological properties of the SnO_x thin films. The influence of two different solvents on the layer morphology of SnO_x thin films is investigated. In both cases, an increasing annealing temperature not only improves the structural and chemical properties of solution‐processed SnO_x, but also reduces the concentration of tin hydroxide species in the bulk and on the surface of these thin films. As a prototypical example for the high potential of printed SnO_x layers for solar cells, high performance perovskite solar cells with a stabilized power conversion efficiency of over 15% are presented.

中文翻译：

固溶钙钛矿太阳能电池中固溶处理的氧化锡作为电子传输层的分析研究

固溶处理的氧化锡（SnO _x）电子传输层在各种光电设备中表现出出色的性能，并通过各种印刷技术提供了简便，低成本的沉积方法。用于制备SnO _x薄膜的最常见的前体溶液是溶解在乙醇中的SnCl ₂。为了阐明在不同退火温度下前体转化的机理以及SnO _x电子传输层的光电性能，声子，振动红外和光电子能谱以及原子力显微镜被用来探测化学，物理和形态SnO _x的性质薄膜。研究了两种不同溶剂对SnO _x薄膜层形貌的影响。在这两种情况下，升高的退火温度不仅改善了固溶处理的SnO _x的结构和化学性质，而且降低了这些薄膜的本体和表面上氢氧化锡物质的浓度。作为用于太阳能电池的印刷SnO _x层具有高潜力的典型示例，提出了一种稳定功率转换效率超过15％的高性能钙钛矿太阳能电池。

更新日期：2020-06-09

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