PREPARATION OF A LANGMUIR-BLODGETT LAYER OF ULTRAFINE PLATINUM PARTICLES AND ITS APPLICATION TO N-SI FOR EFFICIENT PHOTOELECTROCHEMICAL SOLAR-CELLS

被引:20
作者
YAE, S
INAKANISHI, I
NAKATO, Y
TOSHIMA, N
MORI, H
机构
[1] OSAKA UNIV,FAC ENGN SCI,DEPT CHEM,TOYONAKA,OSAKA 560,JAPAN
[2] OSAKA UNIV,PHOTOENERGET ORGAN MAT RES CTR,TOYONAKA,OSAKA 560,JAPAN
[3] UNIV TOKYO,FAC ENGN,DEPT IND CHEM,BUNKYO KU,TOKYO 113,JAPAN
[4] OSAKA UNIV,ULTRA HIGH VOLTAGE ELECTRON MICROSCOPY RES CTR,SUITA,OSAKA 565,JAPAN
关键词
D O I
10.1149/1.2059281
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A Langmuir layer of ultrafine platinum particles (2-6 nm in diam) has been developed on a water surface by dropping a Pt colloid solution, prepared by refluxing an ethanol-water (1:1) solution of hexachloroplatinic(IV) acid in the presence of poly(N-vinyl-2-pyrrolidone) as a stabilizer. The layer is transferred onto a single-crystal n-type silicon (n-Si) wafer by the horizontal lifting method. The Pt particles are rather homogeneously scattered on n-Si, and the particle density can be controlled on a nanometer scale by changing the area of the Langmuir layer at the time of transfer. The open-circuit photovoltage (V(oc)) for photoelectrochemical (PEC) solar cells with such n-Si electrodes is inversely related to Pt-particle density, and reaches 0.635 V, much higher than that for n-Si coated with a continuous Pt layer (ca. 0.30 V) or that for the conventional p-n junction Si solid solar cell of a similar simple cell structure (ca. 0.59 V). This result is in harmony with our previously proposed theory, the above increase in V(oc) being explained by the decrease in the majority carrier dark saturation current density.
引用
收藏
页码:3077 / 3081
页数:5
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