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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 28, Number 4
JKCSEZ 28(4)
August 20, 1984 

 
Title
Surface Photovoltage Spectroscopy on Dyed Zinc Oxide

색소흡착산화아연에 대한 표면광기전력의 분광학적 연구
Author
Young Soon Kim, Yong Kiel Sung

김영순, 성용길
Keywords
Abstract
색소를 흡착시킨 산화아연의 표면상태를 광기전력측정법을 이용하여 색소증감기구 및 바인더( binder)효과에 대한 연구를 수행하였다. 산화아연의 에너지트랩준위는 1.12eV이며, 색소흡착에 의해 0.99eV로 에너지 준위가 낮아짐을 알았다. 바인더 효과는 표면광기전력의 효율을 커지게 하나 에너지 트랩준위에는 변화를 주지 않는다. 또한 색소증감기구로 흡착력이 강한 산형색소는 전자 이동(electron transfer)이며, 산화아연 고유흡수광에 감감작용이 있는 나트륨염형색소는 에너지이동(energy transfer)로써 추측된다. 근적외부인 1,100~1,350nm에 걸쳐 광기전력감도가 나타나므로 적외선에 의한 전자사진용 화상재료로서 가능성을 제시하였다.

The mechanism of photosensitization and the effect of binder on dye-sensitized ZnO have been studied by surface photovoltage spectroscopy. It has been found that the value of energy trapping level Et1 on ZnO is 1.12eV (λ = 1,100nm) and that of energy trapping level Et2 on dye-sensitized ZnO is 0.99eV (λ = 1,250nm) which is shifted towards a longer wavelength. The effect of binder on ZnO has been increased the efficiency of surface photovoltage, but it does not effect the values of energy trapping level. The acid-type dyes agree well with the prediction based on an electron transfer mechanism. The desensitization of the Na salt-type dyes for the intrinsic photoresponse of zinc oxide can be explained by energy transfer mechanism. It has been obtained that the dye-sensitized ZnO indicates the possibility of electrophotographic photosensitizer for the infrared range of light.

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251 - 258
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