On the Germanium Incorporation in Cu2ZnSnSe4 Kesterite Solar Cells Boosting Their Efficiency
On the Germanium Incorporation in Cu2ZnSnSe4 Kesterite Solar Cells Boosting Their Efficiency
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Cu2ZnSnSe4 锌黄锡太阳能电池中掺入锗可提高其效率
DOI:
10.1021/acsaem.9b01784
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
C. S. Schnohr
中科院分区:
文献类型:
--
作者:
M. Ritzer;S. Schönherr;P. Schöppe;W. Wisniewski;S. Giraldo;G. Gurieva;A. Johannes;C. T. Plass;K. Ritter;G. Martínez-Criado;S. Schorr;E. Saucedo;C. Ronning;C. S. Schnohr
The presence of Ge during the synthesis of thin film kesterite Cu2ZnSnSe4(CZTSe) solar cell absorbers boosts their power conversion efficiency, especially due to an improved open circuit voltage. The mechanism underlying this beneficial effect of Ge is still under debate. We gained deep insights into the role of Ge by applying advanced synchrotron nanoprobe-based X-ray fluorescence spectroscopy and X-ray absorption near-edge structure spectroscopy to cross-sectional lamellas taken from high efficiency devices. We observe that Ge remains in the CZTSe absorber layer after the synthesis process with a specific heterogeneous distribution. Different grains contain different Ge concentrations. Moreover, Ge depletion exists at random grain boundaries but not at symmetric Σ3-boundaries, leading to different band alignments. The incorporated Ge occupies Sn lattice sites in the CZTSe crystal structure; however, the concentration is only 0.1 to 0.5 at %. Also Ge aggregates in nanoscale inclusions, which we could identify to be GeO2that likely lessen the beneficial effect of Ge on the photovoltaic performance.
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影响因子:
4
作者:
Philipp Schöppe;C. Schnohr;M. Oertel;Alexander Kusch;A. Johannes;S. Eckner;M. Burghammer;G. Martínez;U. Reislöhner;C. Ronning
通讯作者:
C. Ronning
DOI:
10.1016/j.mseb.2010.03.060
发表时间:
2010-10-25
影响因子:
3.6
作者:
Ramana, C. V.;Carbajal-Franco, G.;Atuchin, V. V.
通讯作者:
Atuchin, V. V.
影响因子:
8.4
作者:
T. Thersleff;S. Giraldo;M. Neuschitzer;P. Pistor;E. Saucedo;K. Leifer
通讯作者:
K. Leifer
影响因子:
4
作者:
P. Schöppe;G. Gurieva;S. Giraldo;G. Martínez-Criado;C. Ronning;E. Saucedo;S. Schorr;C. S. Schnohr
通讯作者:
C. S. Schnohr