Sodium control in Ultrathin Cu(In,Ga)Se2 solar cells on transparent back contact for efficiencies beyond 12%
Sodium control in Ultrathin Cu(In,Ga)Se2 solar cells on transparent back contact for efficiencies beyond 12%
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钠%20control%20in%20超薄%20Cu(In,Ga)Se2%20solar%20cells%20on%20transparent%20back%20contact%20for%20efficicies%20beyond%2012%
DOI：
10.1016/j.solmat.2021.110969
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发表时间：
2021-05
影响因子：
6.9
通讯作者：
Martina Schmid
中科院分区：
文献类型：
--
作者：
Yong Li;Guanchao Yin （通讯作者）;Yao Gao;Tristan Kohler;Jan Lucassen;Martina Schmid
Ultrathin Cu(In,Ga)Se2(CIGSe) solar cells on transparent conductive oxide (TCO) back contacts combine advantages of ultrathin cells for reducing material consumption of rare indium and gallium and TCO-transparency benefited applications in tandems, bifacial configurations etc. However, their efficiencies are still limited and the back barrier potential is a primary reason from an electrical perspective. In this work, we explore the effects of Nadoping by post deposition treatment (PDT) on the performance of ultrathin CIGSe solar cells on ITO (Sn:In2O3)-coated Na-free glass substrates. Na doping enhances not only the open circuit-voltage (Voc) by increasing the doping level, but also the fill factor (FF) by switching the Schottky contact to an Ohmic contact at the CIGSe/ITO interface, which we propose is due to the increased recombination at the back interface. The optimum performance is achieved at a NaF dose of 2 mg with a top efficiency of 12.9%, which exhibits an enhancement by nearly 48% relative compared to the references without Na doping. To our best knowledge, this is the highest efficiency achieved for ultrathin cells (<500 nm absorber thickness) on TCO without additional antireflection or back reflecting layer. Therefore, the results show that sodium control offers a solid basis for the development of ultrathin CIGSe cells on TCO in above-mentioned promising applications.
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影响因子：
3.2
作者：
H. Simchi;B. McCandless;T. Meng;W. Shafarman
通讯作者：
H. Simchi;B. McCandless;T. Meng;W. Shafarman
影响因子：
27.8
作者：
Cao, Qing;Gunawan, Oki;Mitzi, David B.
通讯作者：
Mitzi, David B.
影响因子：
6.9
作者：
G. Yin;Varvara Brackmann;V. Hoffmann;M. Schmid
通讯作者：
G. Yin;Varvara Brackmann;V. Hoffmann;M. Schmid
影响因子：
2.1
作者：
T. Ott;F. Schönberger;T. Walter;D. Hariskos;O. Kiowski;O. Salomon;R. Schäffler
通讯作者：
T. Ott;F. Schönberger;T. Walter;D. Hariskos;O. Kiowski;O. Salomon;R. Schäffler
影响因子：
9.5
作者：
Muhammad Saifullah;S. Rasool;SeJin Ahn;Kihwan Kim;J. Cho;J. Yoo;W. Shin;J. Yun;Joo Hyung Park
通讯作者：
Muhammad Saifullah;S. Rasool;SeJin Ahn;Kihwan Kim;J. Cho;J. Yoo;W. Shin;J. Yun;Joo Hyung Park