Suppressed decomposition of organometal halide perovskites by impermeable electron-extraction layers in inverted solar cells.
Suppressed decomposition of organometal halide perovskites by impermeable electron-extraction layers in inverted solar cells.
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DOI：
10.1038/ncomms13938
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发表时间：
2017-01-09
影响因子：
16.6
通讯作者：
Riedl T
中科院分区：
文献类型：
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作者：
Brinkmann KO;Zhao J;Pourdavoud N;Becker T;Hu T;Olthof S;Meerholz K;Hoffmann L;Gahlmann T;Heiderhoff R;Oszajca MF;Luechinger NA;Rogalla D;Chen Y;Cheng B;Riedl T
有机金属卤化物钙钛矿在薄膜光致发光领域已被淹没。不幸的是，钙钛矿太阳能电池出现了严重的稳定性问题。例如，已知甲基铵碘化铅在水的存在下分解，更严重的是，甚至在高温下的惰性条件下分解。在这里，我们展示了倒置钙钛矿太阳能电池，其中钙钛矿的分解即使在高温下也会显着减轻。具体来说，我们介绍了一个双层电子提取夹层铝掺杂的氧化锌和氧化锡组成。我们的证据表明，通过原子层沉积生长的氧化锡确实形成了一种非常致密的气体渗透屏障，有效地阻止了水分进入钙钛矿，更重要的是，它阻止了钙钛矿分解产物的排出。因此，钙钛矿的整体分解被显著抑制，导致出色的器件稳定性。钙钛矿基太阳能电池的稳定性问题部分是由于电极腐蚀。在这里，Brinkmann等人在活性层和电极之间开发了一种不可渗透的双层电子提取层，抑制钙钛矿的分解并防止内部腐蚀。
The area of thin-film photovoltaics has been overwhelmed by organometal halide perovskites. Unfortunately, serious stability concerns arise with perovskite solar cells. For example, methyl-ammonium lead iodide is known to decompose in the presence of water and, more severely, even under inert conditions at elevated temperatures. Here, we demonstrate inverted perovskite solar cells, in which the decomposition of the perovskite is significantly mitigated even at elevated temperatures. Specifically, we introduce a bilayered electron-extraction interlayer consisting of aluminium-doped zinc oxide and tin oxide. We evidence tin oxide grown by atomic layer deposition does form an outstandingly dense gas permeation barrier that effectively hinders the ingress of moisture towards the perovskite and—more importantly—it prevents the egress of decomposition products of the perovskite. Thereby, the overall decomposition of the perovskite is significantly suppressed, leading to an outstanding device stability. The stability issue of perovskite-based solar cells is in part due to electrode corrosion. Here, Brinkmann et al. develop an impermeable bilayered electron-extraction layer between the active layer and the electrode, suppressing decomposition of the perovskite and preventing corrosion from the inside.