Neutral Color Semitransparent Microstructured Perovskite Solar Cells
Neutral Color Semitransparent Microstructured Perovskite Solar Cells
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DOI：
10.1021/nn4052309
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发表时间：
2014-01-01
期刊：
影响因子：
17.1
通讯作者：
Snaith, Henry J.
中科院分区：
文献类型：
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作者：
Eperon, Giles E.;Burlakov, Victor M.;Snaith, Henry J.
中性色的半透明太阳能电池是商业上需要的，可以将太阳能电池集成到建筑物和汽车的窗户和包层中。在这里，我们报告了使用钙钛矿薄膜的形态控制来形成具有中性颜色和相对高效率的半透明平面异质结太阳能电池。我们利用自发脱湿来创建钙钛矿“岛屿”的微结构阵列，其长度尺度小到足以在眼睛中呈现连续，但又大到足以在岛屿之间实现无衰减的光传输。这些岛屿的厚度足以吸收大部分可见光，完全吸收和完全透明区域的结合导致了光的中性传输。利用这些薄膜，我们制造出具有可观能量转换效率的薄膜太阳能电池。值得注意的是，我们发现由于n型和p型电荷收集层之间的固有整流，这种不连续薄膜仍然具有良好的整流行为和相对较高的开路电压。此外，我们通过在空穴输运介质中掺入染料，证明了在不降低性能的情况下，这种微结构钙矿太阳能电池易于“着色”。
Neutral-colored semitransparent solar cells are commercially desired to integrate solar cells into the windows and cladding of buildings and automotive applications. Here, we report the use of morphological control of perovskite thin films to form semitransparent planar heterojunction solar cells with neutral color and comparatively high efficiencies. We take advantage of spontaneous dewetting to create microstructured arrays of perovskite "islands", on a length-scale small enough to appear continuous to the eye yet large enough to enable unattenuated transmission of light between the islands. The islands are thick enough to absorb most visible light, and the combination of completely absorbing and completely transparent regions results in neutral transmission of light. Using these films, we fabricate thin-film solar cells with respectable power conversion efficiencies. Remarkably, we find that such discontinuous films still have good rectification behavior and relatively high open-circuit voltages due to the inherent rectification between the n- and p-type charge collection layers. Furthermore, we demonstrate the ease of "color-tinting" such microstructured perovksite solar cells with no reduction in performance, by incorporation of a dye within the hole transport medium.