Zur Theorie der Lumineszenz und der elektrischen Leitfähigkeit von Kadmiumsulfidkristallen

Broser, I.; Warminsky, R.

doi:10.1002/andp.19504420605

Cited by 48 publications

(11 citation statements)

References 21 publications

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“…Such relaxation times, as shown in Fig. 6, are typical for photoconductivity (8)(9)(10). Photocurrent relaxation times for light pulses of the primary light source, maintaining constant illumination by the second light source, are much shorter.…”

Section: Resultsmentioning

confidence: 81%

Photoelectrochemical Studies of Nearly Intrinsic Semiconductors Made Possible by Using Photoconductivity

Gerischer

Lübke

Bressel

1983

J. Electrochem. Soc.

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Photocurrent generation for nearly intrinsic semiconductor electrodes has an extremely small quantum yield because the space charge layer is insufficient to promote the efficient separation of electron hole pairs when suitable biases are applied. However, if the bulk material can be made photoconductive, a space charge layer having a higher electric field strength will be created. It is demonstrated that thin platelets of normalGaS and normalCdS , although insulating in the dark, can be used as photoelectrodes if they are illuminated with light having energy less than the bandgap in addition to light having energy above the bandgap. With this arrangement, high quantum yields similar to those obtained for well‐doped semiconductors are obtained. The charge distribution in a semiconductor platelet under various modes of illumination is discussed.

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Section: Resultsmentioning

confidence: 81%

Photoelectrochemical Studies of Nearly Intrinsic Semiconductors Made Possible by Using Photoconductivity

Gerischer

Lübke

Bressel

1983

J. Electrochem. Soc.

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“…In any case, these and other models (9) were not worked out to determine the time dependence of the quenching effect.…”

Section: The Modelmentioning

confidence: 99%

“…The electroluminescent brightness of a powdered phosphor is dependent on many parameters, such as amplitude and frequency of excitingvoltage, shape of the voltage curve, temperature, thickness of the phosphor layer, and kind of phosphor (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). Since a clear interpretation of an experiment requires the variation of only one parameter at a time, the dependence of the time-average of the elcctroluminescent emission intensity, L, on the exciting sinusoida!…”

Section: Introductionmentioning

confidence: 99%

Theory of Dynamic Quenching of Photoconductivity and Luminescence

Matossi¹

1956

J. Electrochem. Soc.

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“…8 Similar studies with the same purpose have been reported for CdS by Klick 9 and Broser and Warminsky. 10 Theoretical studies on the development of energy band diagrams for phosphors have recently been reported by Klick 11 and Williams. 12,13 It is the purpose of this paper to present a summary of measurements, of the different types enumerated above, obtained with a series of ZnS phosphors prepared from the same pure material and prepared under identical conditions.…”

Section: Introductionmentioning

confidence: 99%

Electronic Transitions in the Luminescence of Zinc Sulfide Phosphors

Bube

1953

Phys. Rev.

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The electronic transitions involved in the processes of (1) absorption, (2) excitation, (3) emission, (4) trapping, and (5) photoconductivity, at room temperature, have been measured for zinc sulfide phosphors, without added impurity, and with silver, copper, and manganese impurity.Three types of excitation transitions are found: (1) from the filled band to the conduction band, (2) from an impurity level above the filled band to the conduction band, and (3) from a ground-state level to an excited-state level of an impurity ion. The first two transitions result in trapping and photoconductivity; the third does not. Emission transitions occur from a level below the bottom of the conduction band to a level above the filled band.The same five major trap depths are common to all zinc sulfide phosphors regardless of the nature of the impurity. Optical trap emptying by visible light, like thermal trap emptying, involves a process of stimulation in which trapped electrons are raised into the conduction band before returning to luminescence centers to produce emission.A tentative energy-level diagram is constructed from the data obtained.

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Zur Theorie der Lumineszenz und der elektrischen Leitfähigkeit von Kadmiumsulfidkristallen

Abstract: InhaltsubersichtDie Vorgiinge, die in CdS bei Anregung zu Lumineszenz und elektrischer Leitfahigkeit fiihren, werden auf der Grundlage des Riehl-Schonschen Biindermodelles quantitativ diskutiert.

Cited by 48 publications

References 21 publications

Photoelectrochemical Studies of Nearly Intrinsic Semiconductors Made Possible by Using Photoconductivity

Photoelectrochemical Studies of Nearly Intrinsic Semiconductors Made Possible by Using Photoconductivity

Theory of Dynamic Quenching of Photoconductivity and Luminescence

Electronic Transitions in the Luminescence of Zinc Sulfide Phosphors

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