Strongly emissive perovskite nanocrystal inks for high-voltage solar cells
Strongly emissive perovskite nanocrystal inks for high-voltage solar cells
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DOI：
10.1038/nenergy.2016.194
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发表时间：
2017-02-01
期刊：
影响因子：
56.7
通讯作者：
Manna, Liberato
中科院分区：
文献类型：
--
作者：
Akkerman, Quinten A.;Gandini, Marina;Manna, Liberato
卤化铅钙钛矿半导体最近获得了广泛的兴趣，因为它们在固态光伏器件中的成功实施例具有令人印象深刻的功率转换效率，同时提供相对简单和低成本的可加工性。虽然这些材料的主要光电性能已经满足了高效光电技术的要求，但工业规模的扩大需要更稳健的加工方法，以及比实验室规模上常用的溶剂毒性更小的溶剂。在这里，我们报告了一种快速，室温合成的墨水的基础上CsPbBr 3钙钛矿纳米晶体使用短，低沸点配体和环境友好的溶剂。不需要冗长的合成后处理，油墨直接用于制造高光电质量的薄膜，表现出光致发光量子产率高于30%和放大的自发发射阈值低至1.5 μ J cm（-2）。最后，我们展示了基于钙钛矿纳米晶的太阳能电池的制造，开路电压高达1.5V。
Lead halide perovskite semiconductors have recently gained wide interest following their successful embodiment in solidstate photovoltaic devices with impressive power-conversion efficiencies, while offering a relatively simple and low-cost processability. Although the primary optoelectronic properties of these materials have already met the requirement for high-efficiency optoelectronic technologies, industrial scale-up requires more robust processing methods, as well as solvents that are less toxic than the ones that have been commonly used so successfully on the lab-scale. Here we report a fast, room-temperature synthesis of inks based on CsPbBr3 perovskite nanocrystals using short, low-boiling-point ligands and environmentally friendly solvents. Requiring no lengthy post-synthesis treatments, the inks are directly used to fabricate films of high optoelectronic quality, exhibiting photoluminescence quantum yields higher than 30% and an amplified spontaneous emission threshold as low as 1.5 mu J cm(-2). Finally, we demonstrate the fabrication of perovskite nanocrystal-based solar cells, with open-circuit voltages as high as 1.5V.