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Anomalous photoconductivity of ferrocene

Abstract

Photoconductivity behaviour of ferrocene, a very useful metallo-organic sandwich compound, has been investigated at different constant temperatures using powdery material in a sandwich type of cell configuration and with the exposure of a polychromatic light source (mercury lamp of 125 W). Measurements with a constant d.c. bias voltage (27 V) across the sample cell and a fixed intensity of the exciting light source have shown a drastic change in the photocurrent versus time profile with the increase in temperature. Anomalous changes have been observed in the plot of the photocurrent versus reciprocal of temperature. Such changes are completely absent in the corresponding dark current behaviour. The photoinduced changes have been observed to be almost reversible in the entire temperature range. In a particular temperature range the reversibility of photocurrent is accompanied by fluctuations in equilibrium current obtained after switching off the light source. The observed anomalous changes in photocurrent have been explained by photoinduced phase transition in ferrocene. The possible origin and implications of this photoinduced phase transition are discussed. (orig.)
Authors:
Chakraborty, A K; [1]  Mallik, B [1] 
  1. Indian Association for the Cultivation of Science, Calcutta (India). Dept. of Spectroscopy
Publication Date:
Aug 15, 1995
Product Type:
Journal Article
Reference Number:
SCA: 360606; 360602; PA: CHF-95:0GJ679; EDB-95:143268; SN: 95001482145
Resource Relation:
Journal Name: Synthetic Metals; Journal Volume: 73; Journal Issue: 3; Other Information: PBD: 15 Aug 1995
Subject:
36 MATERIALS SCIENCE; IRON COMPOUNDS; ORGANOMETALLIC COMPOUNDS; PHOTOCONDUCTIVITY; PHASE TRANSFORMATIONS; PHOTOEMISSION; PHOTOCURRENTS
OSTI ID:
117091
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: SYMEDZ; ISSN 0379-6779; TRN: CH95GJ679
Submitting Site:
CHF
Size:
pp. 239-245
Announcement Date:

Citation Formats

Chakraborty, A K, and Mallik, B. Anomalous photoconductivity of ferrocene. Switzerland: N. p., 1995. Web. doi:10.1016/0379-6779(95)80021-2.
Chakraborty, A K, & Mallik, B. Anomalous photoconductivity of ferrocene. Switzerland. doi:10.1016/0379-6779(95)80021-2.
Chakraborty, A K, and Mallik, B. 1995. "Anomalous photoconductivity of ferrocene." Switzerland. doi:10.1016/0379-6779(95)80021-2. https://www.osti.gov/servlets/purl/10.1016/0379-6779(95)80021-2.
@misc{etde_117091,
title = {Anomalous photoconductivity of ferrocene}
author = {Chakraborty, A K, and Mallik, B}
abstractNote = {Photoconductivity behaviour of ferrocene, a very useful metallo-organic sandwich compound, has been investigated at different constant temperatures using powdery material in a sandwich type of cell configuration and with the exposure of a polychromatic light source (mercury lamp of 125 W). Measurements with a constant d.c. bias voltage (27 V) across the sample cell and a fixed intensity of the exciting light source have shown a drastic change in the photocurrent versus time profile with the increase in temperature. Anomalous changes have been observed in the plot of the photocurrent versus reciprocal of temperature. Such changes are completely absent in the corresponding dark current behaviour. The photoinduced changes have been observed to be almost reversible in the entire temperature range. In a particular temperature range the reversibility of photocurrent is accompanied by fluctuations in equilibrium current obtained after switching off the light source. The observed anomalous changes in photocurrent have been explained by photoinduced phase transition in ferrocene. The possible origin and implications of this photoinduced phase transition are discussed. (orig.)}
doi = {10.1016/0379-6779(95)80021-2}
journal = {Synthetic Metals}
issue = {3}
volume = {73}
journal type = {AC}
place = {Switzerland}
year = {1995}
month = {Aug}
}