Silver-alloyed wide-gap CuGaSe2 solar cells
Silver-alloyed wide-gap CuGaSe2 solar cells
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银合金宽禁带 CuGaSe2 太阳能电池
DOI：
10.1016/j.solener.2021.10.055
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发表时间：
2021
期刊：
影响因子：
6.7
通讯作者：
Minemoto Takashi
中科院分区：
文献类型：
--
作者：
Nishimura Takahito;Doi Atsuya;Chantana Jakapan;Mavlonov Abdurashid;Kawano Yu;Minemoto Takashi
证明了通过添加银 (Ag) 可以促进 CuGaSe2(CGSe) 光伏吸收体的晶体生长，从而提高宽禁带 CGSe 太阳能电池的器件性能。通过引入Ag前驱体，三阶段工艺沉积的多晶CGSe薄膜的晶粒尺寸增大，并且抑制了生长过程中残留的Ga2Se3相。添加 Ag 后光致发光强度增强，表明非辐射复合减少，这与 Ga2Se3 相的抑制和不良深层缺陷水平的减少有关。对于银合金化的 CGSe 太阳能电池，从指数外部量子效率的亚能隙尾部定义的 Urbach 能量从 25.5 meV 单调减少到 21.1 meV，这表明银合金化提高了 CGSe 的块体质量。由于银合金 CGSe 块体中的载流子复合受到抑制，因此开路电压得到提高。由于银合金化降低了载流子浓度，扩大了耗尽宽度，从而提高了载流子收集效率，从而提高了短路电流密度。另一方面，由于Ag合金CGSe吸收体中的载流子浓度降低，过量的Ag添加导致太阳能电池的串联电阻增加和内建电势恶化。最后，Ag 合金 CGSe 太阳能电池的 [Ag] / ([Ag] + [Cu]) 比率为 0.07 时，转换效率最大化至 5.3%。这些发现将有助于提高宽禁带CGSe太阳能电池的性能。
Crystal growth promotion for CuGaSe2(CGSe) photovoltaic absorber by silver (Ag)-addition is demonstrated, enhancing device performance for wide-gap CGSe solar cells. By introducing Ag precursor, the grain size in the polycrystalline CGSe films deposited by the three-stage process is increased, and a residual Ga2Se3phase during the growth is suppressed. Photoluminescence intensity is enhanced with Ag-addition, indicating reduced non-radiative recombination, which is related to the suppression of Ga2Se3phase and reduction of undesirable deep defect levels. For the Ag-alloyed CGSe solar cells, Urbach energy defined from the sub-gap tail in exponential external quantum efficiency is monotonically reduced from 25.5 to 21.1 meV, suggesting the improvement of CGSe bulk quality by Ag-alloying. Open-circuit voltage is enhanced since carrier recombination in Ag-alloyed CGSe bulk is suppressed. Short-circuit current density is also enhanced as carrier collection efficiency is improved by widened depletion width due to the reduction of carrier concentration by Ag-alloying. On the other hand, excess Ag-addition leads to increased series resistance and deterioration of the built-in potential in the solar cells due to the reduced carrier concentration in the Ag-alloyed CGSe absorber. Finally, the conversion efficiency is maximized to 5.3% at [Ag] / ([Ag] + [Cu]) ratio of 0.07 for the Ag-alloyed CGSe solar cells. These findings will help the performance enhancement for the wide-gap CGSe solar cells.
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DOI：
10.1109/jphotov.2019.2899962
发表时间：
2019-03
期刊：
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC)
影响因子：
--
作者：
Nicholas H. Valdes;Jinwoo Lee;W. Shafarman
通讯作者：
Nicholas H. Valdes;Jinwoo Lee;W. Shafarman
Cu(In,Ga)(S,Se)2吸收剂的老化对其全干法无镉太阳能电池光伏性能的影响：载流子复合分析
影响因子：
27.8
作者：
Jakapan Chantana;Takahito Nishimura;Y. Kawano;N. Suyama;A. Yamada;Y. Kimoto;T. Kato;H. Sugimoto;T. Minemoto
通讯作者：
T. Minemoto
影响因子：
27.8
作者：
Rodriguez-Alvarez, Humberto;Weber, Alfons;Mainz, Roland
通讯作者：
Mainz, Roland
吸收剂化学计量在 (Ag,Cu)(In,Ga)Se 2 宽禁带太阳能电池中的重要作用
影响因子：
2.7
作者：
J. Keller;L. Stolt;K. Sopiha;J. Larsen;L. Riekehr;M. Edoff
通讯作者：
M. Edoff
影响因子：
2.1
作者：
Erslev, Peter T.;Lee, JinWoo;Cohen, J. David
通讯作者：
Cohen, J. David