Mechanically-stacked perovskite/CIGS tandem solar cells with efficiency of 23.9% and reduced oxygen sensitivity†,Energy & Environmental Science

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Mechanically-stacked perovskite/CIGS tandem solar cells with efficiency of 23.9% and reduced oxygen sensitivity†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7ee02627g
Heping Shen _{1,

2,

3,

4,

5} , The Duong _{1,

2,

3,

4,

5} , Jun Peng _{1,

2,

3,

4,

5} , Daniel Jacobs _{1,

2,

3,

4,

5} , Nandi Wu _{1,

2,

3,

4,

5} , Junbo Gong _{6,

7,

8,

9} , Yiliang Wu _{1,

2,

3,

4,

5} , Siva Krishna Karuturi _{3,

5,

10,

11} , Xiao Fu _{1,

2,

3,

4,

5} , Klaus Weber _{1,

2,

3,

4,

5} , Xudong Xiao _{6,

7,

8,

9} , Thomas P. White _{1,

2,

3,

4,

5} , Kylie Catchpole _{1,

2,

3,

4,

5}

Affiliation

A perovskite/CIGS tandem configuration is an attractive and viable approach to achieve an ultra-high efficiency and cost-effective all-thin-film solar cell. In this work, we developed a semi-transparent perovskite solar cell (PSC) with a maximum efficiency of 18.1% at a bandgap of ∼1.62 eV. Combining this cell in a mechanically stacked tandem configuration with a 16.5% CIGS cell results in a tandem efficiency of 23.9%. We also present a semi-transparent high bandgap (∼1.75 eV) PSC with a champion efficiency of 16.0% that enables a tandem efficiency of 23.4%. Optical simulation predicts that a perovskite/CIGS tandem efficiency of over 30% is feasible with a high bandgap perovskite top cell. The multiple-cation perovskite absorbers enabling high tandem efficiencies in this work are found to be remarkably less sensitive towards oxygen exposure compared to the widely used CH₃NH₃PbI₃ (MAPbI₃). By combining systematic compositional tuning of perovskite materials and the simultaneous probe of terminal open-circuit voltage (V_oc) and Photoluminence (PL) of PSCs, it is deduced that an interaction between methylamonnium (MA) cations and oxygen molecules results in an increased surface recombination rate, and this is the main driver for oxygen-induced degradation. The extraordinary device performance and stability reported in this work pave the way for ultimately realizing the commercialization of all-thin-film photovoltaic technology.

中文翻译：

机械堆叠钙钛矿/ CIGS串联太阳能电池，效率达23.9％，氧气敏感性降低†

钙钛矿/ CIGS串联配置是一种吸引人且可行的方法，可实现超高效率和具有成本效益的全薄膜太阳能电池。在这项工作中，我们开发了一种半透明钙钛矿太阳能电池（PSC），其带隙约为1.62 eV，最大效率为18.1％。以机械堆叠的串联配置将此电池与16.5％CIGS电池组合在一起，可产生23.9％的串联效率。我们还提出了一种半透明的高带隙（〜1.75 eV）PSC，其冠军效率为16.0％，串联效率为23.4％。光学模拟预测，对于高带隙钙钛矿顶部电池，钙钛矿/ CIGS串联效率超过30％是可行的。₃ NH₃碘化铅₃（MAPbI₃）。通过结合钙钛矿材料的系统组成调整和同时检测PSC的端开路电压（ V _oc）和光致发光（PL），可以推断出甲基铵（MA）阳离子与氧分子之间的相互作用导致表面增加重组率，这是氧诱导降解的主要驱动力。这项工作中报道的非凡的设备性能和稳定性为最终实现全薄膜光伏技术的商业化铺平了道路。

更新日期：2018-01-02

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