TORWARDS MARKETABLE EFFICIENCY SOLUTION-PROCESSED KESTERITE AND CHALCOPYRITE PHOTOVOLTAIC DEVICES

被引:0
|
作者
Mitzi, David B. [1 ]
Todorov, Teodor K. [1 ]
Gunawan, Oki [1 ]
Yuan, Min [1 ]
Cao, Qing [1 ]
Liu, Wei [1 ]
Reuter, Kathleen B. [1 ]
Kuwahara, Masaru
Misumi, Kouichi [2 ]
Kellock, Andrew J.
Chey, S. Jay [1 ]
de Monsabert, Thomas Goislard [1 ]
Prabhakar, Aparna [1 ]
Deline, Vaughn
Fogel, Keith E. [1 ]
机构
[1] IBM Corp, Thomas J Watson Res Ctr, POB 218, Yorktown Hts, NY 10598 USA
[2] Tokyo Ohka Kogyo Co Ltd, Kanagawa, Japan
关键词
FILM SOLAR-CELLS; MATERIALS AVAILABILITY; OPTIMIZATION; ABSORBER;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Although CuIn1-xGaxSe2-ySy (CIGS) chalcopyrite and Cu2ZnSn(S, Se)(4) (CZTSSe) kesterite-related films offer significant potential for low-cost high-efficiency photovoltaic (PV) devices, the complicated multi-element nature of these materials generally leads to the requirement of more complex and costly deposition processes. This talk focuses on employing the unique solvent properties of hydrazine to solution-deposit CIGS and CZTSSe films for high-performance solar cells. CIGS films are deposited by completely dissolving all elements in hydrazine, solution-depositing a molecular precursor film, and heat treating in an inert atmosphere, to yield a single-phase chalcopyrite film (no post-deposition selenization required). Trace additions of Sb improve grain structure in the resulting film and enhance device performance. Devices based on a glass/Mo/spin-coated CIGS/CdS/i-ZnO/ITO structure yield power conversion efficiencies of as high as 13.6% (AM1.5 illumination; NREL certified). Analogous CZTSSe absorber layers have been processed using a hybrid hydrazine-based slurry approach, enabling liquid-based deposition of kesterite-type films and resulting device efficiencies of as high as 9.6% (AM1.5 illumination; NREL certified)-exceeding the previous kesterite performance record by similar to 40%. The combination of improved efficiency, In-free absorber and solution-based processing opens opportunities for development of a low-cost and pervasive technology.
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页数:4
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