Final Report

Dr. Meng Tao

关键词: ANNEALING;    COPPER;    DEPOSITION;    GALLIUM SELENIDES;    INDIUM;    OXIDES;    PROCESSING;    SILICON;    SOLAR CELLS;    TARGETS;    WATER;    YTTRIUM;    ZINC OXIDES;    THIN FILMS;   

DOI  :  10.2172/1000525
RP-ID  :  DE-EE0000577
PID  :  OSTI ID: 1000525
Others  :  TRN: US201202%%596

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

The objective of this DOE SAI project is to demonstrate the feasibility of electrodeposited and solution-doped transparent conducting oxides (TCOs) such as zinc oxide with resistivity in the mid-10{sup -4} {Omega}-cm range. The target application is an 'on-top' TCO which can be deposited on semiconductors in thin-film and future solar cells including amorphous silicon, copper indium gallium selenide and emerging solar cells. There is no solution-prepared on-top TCO currently used in commercial solar cells. This project, if successful, will fill this gap. Our technical objectives include electrodeposited TCOs with (1) resistivity in the mid-10{sup -4} {Omega}-cm range, (2) post-deposition annealing below 300 C and (3) no-vacuum processing or low-vacuum processing. All the three research objectives listed above have been accomplished in the 14-month period from July 1, 2009 through September 30, 2010. The most noticeable accomplishments of this project are (1) identification of a terawatt-scale dopant for zinc oxide, i.e. yttrium, whose known reserve is enough for 60 peak terawatts of thin-film solar cells; (2) demonstration of a record-low resistivity, 6.3 x 10{sup -5} {Omega}-cm, in solution-deposited zinc oxide with an abundant dopant; and (3) the record-low resistivity was accomplished with a maximum process temperature of 300 C and without vacuum annealing. Industrial applications of the new yttrium-doped zinc oxide are being pursued, including (1) green deposition of yttrium-doped zinc oxide to reduce water consumption during deposition and (2) search for an industrial partner to develop an electrochemical tool for large-area uniform deposition of yttrium-doped zinc oxide.