• Title/Summary/Keyword: Materials Technology

Search Result 27,348, Processing Time 0.063 seconds

FABRICATION OF HIGH QUALITY YBa$_2$Cu$_3$O$_{y}$ THIN FILMS USING PULSED LASER DEPOSITION

  • Lee, Eun-Hong;Park, Sang-Jin;Song, I-Hun;Song, In-Sang;Gohng, Jun-Ho;Sok, Jung-Hyun;Lee, Jo-Won
    • Journal of the Korean institute of surface engineering
    • /
    • v.29 no.5
    • /
    • pp.437-442
    • /
    • 1996

  • High quality $YBa_2Cu_3O_y$(YBCO) thin films for directly coupled dc superconducting quantum interference device (SQUID) were fabricated by pulsed laser deposition. Several critical parameters have been optimized through systematic studies. Thus, the films showing the $T_c$ of above 91K and $J_c$ of above$2\times10^6A/cm^2$ at 77K were routinely obtained. Extensive AFM and X-ray diffraction studies have been conducted for morphological and structural analyses. The directly coupled DC-SQUIDs were fabricated from the YBCO thin films deposited on $SrTiO_3$ bicrystals under the optimized conditions. The measurement on $2I_c$ and swing voltage give 200$\mu$A and 17$\mu$V at 77K, respectively.

  • PDF

High Efficiency Crystalline Silicon Solar Cells (고효율 단결정 실리콘 태양전지)

  • Kim, D.S.;Cho, E.C.;Cho, Y.H.;Ebong, A.U.;Min, Y.S.;Lee, S.H.
    • Solar Energy
    • /
    • v.17 no.1
    • /
    • pp.17-26
    • /
    • 1997

  • Since PESC(passivated emitter solar cell) was developed in 1985, high efficiency silicon solar cell technology based on planar technology has been improved in the order of PERC, Point Contact Solar Cell, PERL. BCSC and DSBC, which do not require photolithography, are expected to replace commercial screen printed cells because of its potential for low cost and high efficiency. In this paper, history and characteristics of each type of cells are reviewed.

  • PDF