Solar cells that operate efficiently under indoor lighting are of great practical interest as they can serve as electric power sources for portable electronics and devices for wireless sensor networks or the Internet of Things. Here, we demonstrate a dye-sensitized solar cell (DSC) that achieves very high power-conversion efficiencies (PCEs) under ambient light conditions. Our photosystem combines two judiciously designed sensitizers, coded D35 and XY1, with the copper complex Cu(II/I)(tmby) as a redox shuttle (tmby, 4,4′,6,6′-tetramethyl-2,2′-bipyridine), and features a high open-circuit photovoltage of 1.1 V. The DSC achieves an external quantum efficiency for photocurrent generation that exceeds 90% across the whole visible domain from 400 to 650 nm, and achieves power outputs of 15.6 and 88.5 μW cm^–2 at 200 and 1,000 lux, respectively, under illumination from a model Osram 930 warm-white fluorescent light tube. This translates into a PCE of 28.9%.

中文翻译：

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染料敏化太阳能电池可在环境照明下高效发电

在室内照明下有效运行的太阳能电池具有极大的实用价值，因为它们可以用作便携式电子设备和无线传感器网络或物联网设备的电源。在这里，我们演示了一种染料敏化太阳能电池（DSC），该染料在环境光条件下可实现非常高的功率转换效率（PCE）。我们的光系统结合了经过精心设计的两种敏化剂（编码为D35和XY1）和铜络合物Cu（II / I）（tmby）作为氧化还原梭（tmby，4,4'，6,6'-tetramethyl-2,2'-双吡啶），并具有1.1 V的高开路光电压.DSC在400至650 nm的整个可见光域中实现了超过90％的光电流产生的外部量子效率，并实现了15.6和88.5μWcm的功率输出在Osram 930型暖白荧光灯管的照明下，分别为200和1,000 lux时的^–2。这意味着PCE为28.9％。