Energy levels of defects in electroluminescent ZnS:Mn thin films exhibiting hysteresis and self-organized patterns

Vlasenko, N. A.; Denisova, Z. L.; Veligura, L. I.; Zuccaro, S.; Niedernostheide, F.‐J.; Purwins, H.‐G.

doi:10.1016/s0022-0248(00)00262-1

Cited by 5 publications

(9 citation statements)

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“…This instability is due to the positive feed back (PFB) between the tunnel emission and impact generation of free electrons and the enhancement of the field in the ZnS:Mn film due to the formation of a polarization charge, in particular, a positive space charge (PSC). It has been confirmed [10,15,16] that the hysteresis appears only at a rather high Mn concentration (C Mn > > 10 20 cm 3 ). The width of the hysteresis loop increases as C Mn increases up to 8⋅10 20 cm 3 .…”

mentioning

confidence: 92%

“…This is accompanied by an increase of the slope of the L(V) and Q(V) characteristics ( Fig. 2, [15]) that means a rapider enhancement of the field strength with increasing V, i.e. the faster formation of PSC.…”

mentioning

confidence: 97%

“…the influence of the defects on L(V) and Q(V) characteristics. the dependencies of parameters of the hysteresis of the characteristics on the temperature and the frequency (f) of the applied voltage [15,16]. The hysteresis of the L(V) and Q(V) characteristics of TFELS results from the S-type instability of the latter.…”

mentioning

confidence: 99%

“…In the PDP spectra of both types of TFELS, an impurity photocurrent peak at 3.43.45 eV was found to intensify significantly when C Mn is increased ( Fig. 3 [11,15,16]). This peak has been attributed to the photoionization of [ ] 0 2 Zn Mn + IVTs created when Mn 2+ ions substitute for Zn 2+ ions.…”

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confidence: 99%

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Self-organization patterns in electroluminescence of bistable ZnS:Mn thin-film structures

Vlasenko¹

2004

Semicond. Phys. Quantum Electron. Optoelectron.

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An overview of recent original results concerning self-organized pattern formation in the emission of bistable alternating current ZnS:Mn thin -film electroluminescent structures (TFELS) as a dissipative system is given. The influence of technological factors, affecting the properties TFELS, and driving conditions on both the patterns and the hysteresis of the charge-voltage dependence that is responsible for bistability of the TFELS are considered. The correlation between patterns and the shape of the hysteresis is analyzed. The physical processes with positive and negative feedback, which serve, respectively, as activator and inhibitor in the given dissipative system, are discussed.

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confidence: 92%

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confidence: 97%

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confidence: 99%

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confidence: 99%

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Self-organization patterns in electroluminescence of bistable ZnS:Mn thin-film structures

Vlasenko¹

2004

Semicond. Phys. Quantum Electron. Optoelectron.

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“…A variety of dynamic patterns in the emission of some bistable ZnS:Mn alternative current thin-film electroluminescent structures (ac TFELS), which have a self-organization nature, takes place at suitable driving conditions [1][2][3][4][5]. The bistability of these TFELS, i.e.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effects on Self-Organized Patterns and Characteristics of Bistable ZnS:Mn Thin-Film Structures

Vlasenko

Purwins

Попов

et al. 2002

phys. stat. sol. (a)

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A temperature (T) rise from 20 up to 80 °C results in some decrease of the threshold voltage and slope of the voltage (V) dependences of the luminance and the transferred charge of the electron‐beam evaporated ZnS:Mn ac thin film electroluminescent structures (ac TFELS) showing different patterns or no patterns in the emission. Such a heating leads to an improvement of the dynamics of all the patterns, to a narrowing and acceleration of the autowave (AW) front. However, the dynamic patterns are not formed by such a heat treatment if they are absent at any frequency of V and T = 20 °C. Although AWs more often take place at 70–80 °C, they have also been observed at T ≤ 40 °C in some samples. It has been concluded that heating is not a sufficient condition for the formation of patterns. It enhances the generation of initial free electrons at a given V, promotes a lateral spreading of the non‐equilibrium charge carriers, but decreases the rate of all processes responsible for the bistability of the TFELS and the self‐organization in them.

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Dissipative solitons

Purwins¹,

Bödeker²,

Amiranashvili³

2010

Advances in Physics

220

193

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Energy levels of defects in electroluminescent ZnS:Mn thin films exhibiting hysteresis and self-organized patterns

Cited by 5 publications

References 10 publications

Self-organization patterns in electroluminescence of bistable ZnS:Mn thin-film structures

Self-organization patterns in electroluminescence of bistable ZnS:Mn thin-film structures

Temperature Effects on Self-Organized Patterns and Characteristics of Bistable ZnS:Mn Thin-Film Structures

Dissipative solitons

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