Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers
Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers
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DOI：
10.1126/science.aad1015
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发表时间：
2015-11-20
期刊：
影响因子：
56.9
通讯作者：
Han, Liyuan
中科院分区：
文献类型：
--
作者：
Chen, Wei;Wu, Yongzhen;Han, Liyuan
钙钛矿太阳能电池（PSCs）的功率转换效率（PCE）近期大幅提高，这在全球范围内引发了大量研究。然而，在通常小于0.1平方厘米的光照面积下，往往是在稳定性较差的情况下实现高PCE值的。我们在平面PSCs中使用了重掺杂的无机电荷提取层，即使是10到20纳米厚的层，也能实现非常快速的载流子提取，避免了针孔并消除了大面积的局部结构缺陷。这些层的稳固无机特性使得能够制造出孔径面积大于1平方厘米且PCE大于15%的PSCs，这已得到一家经认可的光伏校准实验室的认证。电流 - 电压特性中的迟滞现象被消除；这些PSCs很稳定，在1000小时的光照浸泡后仍能保持初始PCE的90%以上。
The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction, even with 10- to 20-nanometer-thick layers, avoiding pinholes and eliminating local structural defects over large areas. The robust inorganic nature of the layers allowed for the fabrication of PSCs with an aperture area >1 square centimeter that have a PCE >15%, as certified by an accredited photovoltaic calibration laboratory. Hysteresis in the current-voltage characteristics was eliminated; the PSCs were stable, with >90% of the initial PCE remaining after 1000 hours of light soaking.