Thermal Quenching Effect of Transient Photocurrents in Evaporated Thin Films of β-Copperphthalocyanine under an Ultra-High Vacuum

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概要

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• The temperature dependence of photocurrents was investigated in evaporated thin films of β-copperphthalocyanine in the near ultraviolet and visible regions under an ultra-high vacuum. Thermal quenching of the photocurrent was observed to begin at about l20℃ and the photocurrent was completely quenched at about 150℃. The photocurrent re-appeared as the temperature was decreased. The quenching mechanism is discussed in terms of the extrinsic dissociation of excitons, which generates free electrons and holes. Thermal desorption of the adsorbed gases, which is a key factor in carrier formation, causes thermal quenching. The thermal quenching was found to be a characteristic of thin films.

• 社団法人応用物理学会の論文
• 1981-10-05

著者

• MIZUGUCHI Jin

  Sony Corporation Research Center

関連論文

• Blue Electrochromism in Viologen-Cyclodextrin/Ferrocyanide System
• Effect of Oxygen and Hydrogen on the Thermal Quenching and Thermally-Assisted Optical Quenching of Photocurrents in Evaporated Thin Films of β-Copperphthalocyanine
• Observation of the Potential Barrier in Cuprous Oxide Rectifier with Scanning Electron Microscopy Using Beam Induced Current
• Fast Photoconduction Decays in Evaporated Thick Films of β-Copperphthalocyanine
• Thermal Quenching Effect of Transient Photocurrents in Evaporated Thin Films of β-Copperphthalocyanine under an Ultra-High Vacuum
• Direct Observation of the Thermal Desorption of Oxygen from the Surface of β-Copperphthalocyanine by X-Ray Photoelectron Spectroscopy
• Green Electrochromism in the System of p-Cyanophenylviologen and Potassium Ferrocyanide

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