Photoelectronic Effects in Organic Materials‐i. Chlorophyll‐chloranil Lamellar Systems

Reucroft, P. J.; Simpson, William H.

doi:10.1111/j.1751-1097.1969.tb07224.x

Cited by 18 publications

(3 citation statements)

References 12 publications

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“…Jones et a1 (1980) present arguments to support the view that the photovoltage is generated at the Al,O,/chlorophyll interface. This work extends and confirms the results obtained by Reucroft and Simpson (1969) and Simpson and Reucroft (1970). Miyasaka et a1 (1978,1979,1980) have made similar studies using transparent SnO, as the substrate and a solution of hydroquinone as the other electrode.…”

Section: Photocurrents Through the J L Msupporting

confidence: 88%

The physics of Langmuir-Blodgett films

Tredgold

1987

Rep. Prog. Phys.

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Langmuir-Blodgett (LB) films are formed by the successive deposition of a series of monolayers of one or more types of amphiphilic molecules initially spread at the interface between water and air. They usually consist of a regular planar array of molecular layers having a well defined and predetermined thickness. Their properties have made them of interest to physicists, electronic engineers, chemists and biologists. This review is mainly addressed to physicists and device engineers but, since the topic is of an interdisciplinary nature, it is hoped that it may also be of use to research workers in other disciplines. The early development and essential technology of the subject are discussed and key papers are referred to. However, the review is mainly devoted to the large amount of recent work in the field. The application of LB films to the study of dye molecules and their interactions is not dealt with in any detail as this topic has been well reviewed elsewhere and leads, in any case, to the general study of dye molecules which is beyond the scope of this review. A wide variety of different types of amphiphilic molecule are discussed ranging from simple carboxylic acids via complex heterocyclic compounds to polymers. The various physical techniques used to determine the crystallographic structure of the films together with the influence of deposition methods on this structure are discussed. The study of the electric and optical properties of various LB films is described both in relation to the physical information which may be gained from these studies and also in respect of possible technical applications. The difficulties inherent in attempting to obtain good threedimensional crystallographic order in films are pointed out together with possible methods of overcoming these difficulties.

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Section: Photocurrents Through the J L Msupporting

confidence: 88%

The physics of Langmuir-Blodgett films

Tredgold

1987

Rep. Prog. Phys.

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“…A biphotonic photoeffect in Chl monolayers has been observed previously but was not explained. 22 We postulate that this reaction occurs via the first and second triplet states; the second triplet can be reached by a triplet-triplet absorption. When &carotene, a triplet quencher, was mixed into the film a t concentrations of 5-10 mol %, the photoeffect was quenched.…”

Section: Resultsmentioning

confidence: 99%

“…In monolayer assemblies of Chi, photoconductivity was reported first by Nelson,19 and later by Meilanov et al 20 and by Villar et al 21 The photovoltaic effect in a system of Chi monolayers with sublimed chloranil was reported by Reucroft and Simpson. 22 Recently, Watanabe et al 23 and Miyasaka et al 24 have reported high quantum yields of electron transfer in Chi monolayers on SnOa conducting glass. Our work is an extension of the photovoltaic studies.…”

Section: Introductionmentioning

confidence: 99%

Photochemical electron transfer in monolayer assemblies. 2. Photoelectric behavior in chlorophyll a/acceptor systems

Janzen¹,

Bolton²

1979

J. Am. Chem. Soc.

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A photoelectric effect has been observed in monolayer assemblies of chlorophyll and acceptor molecules deposited on a semitransparent aluminum electrode. The counterelectrode was mercury. With acceptors containing saturated side chains an open-circuit photovoltage of 150 mV and a short-circuit photocurrent of 34 nA cm-2 were detected across a load resistor. The quantum yield of electrons per photon was -2 X The current-voltage behavior was rectifying with a dark conductivity of -1.5 X 9-' cm-l. If acceptors with unsaturated side chains were used such as ubiquinone or plastoquinone ( I O mol % in stearic acid), the conductivity improved by a factor of IO. The open-circuit photovoltage now was 270 mV and the short-circuit photocurrent detected was 140 nA cm-2. The quantum yield was -2 X The reduction of the quinone group left the photoresponse unchanged. Similarly, the use of the polyisopropene squalene instead of plastoquinone left the photoresponse unchanged. The suggestion is made that the polyisopropene chain may be acting as "nature's molecular wire" making possible the tunnelling of electrons through lipid membranes and the maximum power conversion efficiency was -4 X and the maximum power conversion efficiency was -4 X

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The effect of adsorbed o-chloranil on the surface photovoltage of metal-free phthalocyanine films

Dahlberg¹,

Musser²

1979

Surface Science

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Photoelectronic Effects in Organic Materials‐i. Chlorophyll‐chloranil Lamellar Systems

Cited by 18 publications

References 12 publications

The physics of Langmuir-Blodgett films

The physics of Langmuir-Blodgett films

Photochemical electron transfer in monolayer assemblies. 2. Photoelectric behavior in chlorophyll a/acceptor systems

The effect of adsorbed o-chloranil on the surface photovoltage of metal-free phthalocyanine films

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