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Mixed Sn–Ge Perovskite for Enhanced Perovskite Solar Cell Performance in Air
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-03-14 00:00:00 , DOI: 10.1021/acs.jpclett.8b00275 Nozomi Ito 1 , Muhammad Akmal Kamarudin 1 , Daisuke Hirotani 1 , Yaohong Zhang 2 , Qing Shen 2 , Yuhei Ogomi 1 , Satoshi Iikubo 1 , Takashi Minemoto 3 , Kenji Yoshino 4 , Shuzi Hayase 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-03-14 00:00:00 , DOI: 10.1021/acs.jpclett.8b00275 Nozomi Ito 1 , Muhammad Akmal Kamarudin 1 , Daisuke Hirotani 1 , Yaohong Zhang 2 , Qing Shen 2 , Yuhei Ogomi 1 , Satoshi Iikubo 1 , Takashi Minemoto 3 , Kenji Yoshino 4 , Shuzi Hayase 1
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Lead-based perovskite solar cells have gained ground in recent years, showing efficiency as high as 20%, which is on par with that of silicon solar cells. However, the toxicity of lead makes it a nonideal candidate for use in solar cells. Alternatively, tin-based perovskites have been proposed because of their nontoxic nature and abundance. Unfortunately, these solar cells suffer from low efficiency and stability. Here, we propose a new type of perovskite material based on mixed tin and germanium. The material showed a band gap around 1.4–1.5 eV as measured from photoacoustic spectroscopy, which is ideal from the perspective of solar cells. In a solar cell device with inverted planar structure, pure tin perovskite solar cell showed a moderate efficiency of 3.31%. With 5% doping of germanium into the perovskite, the efficiency improved up to 4.48% (6.90% after 72 h) when measured in air without encapsulation.
中文翻译：
混合Sn–Ge钙钛矿可增强空气中钙钛矿的太阳能电池性能
近年来，铅基钙钛矿太阳能电池取得了进展，显示出高达20％的效率，与硅太阳能电池相当。但是，铅的毒性使其成为用于太阳能电池的非理想选择。或者，由于其无毒的性质和丰度，已经提出了锡基钙钛矿。不幸的是，这些太阳能电池效率低且稳定性差。在这里，我们提出了一种基于混合锡和锗的新型钙钛矿材料。从光声光谱法测得，该材料显示出约1.4–1.5 eV的带隙，从太阳能电池的角度来看，这是理想的。在具有倒置的平面结构的太阳能电池装置中，纯钙钛矿锡太阳能电池显示出3.31％的中等效率。通过将5％的锗掺杂到钙钛矿中，效率提高到4。
更新日期：2018-03-14
中文翻译：
混合Sn–Ge钙钛矿可增强空气中钙钛矿的太阳能电池性能
近年来，铅基钙钛矿太阳能电池取得了进展，显示出高达20％的效率，与硅太阳能电池相当。但是，铅的毒性使其成为用于太阳能电池的非理想选择。或者，由于其无毒的性质和丰度，已经提出了锡基钙钛矿。不幸的是，这些太阳能电池效率低且稳定性差。在这里，我们提出了一种基于混合锡和锗的新型钙钛矿材料。从光声光谱法测得，该材料显示出约1.4–1.5 eV的带隙，从太阳能电池的角度来看，这是理想的。在具有倒置的平面结构的太阳能电池装置中，纯钙钛矿锡太阳能电池显示出3.31％的中等效率。通过将5％的锗掺杂到钙钛矿中，效率提高到4。
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