Donor and acceptor competitions in phosphorus-doped ZnO

Xiu, Faxian; Zheng, Youdou; Mandalapu, L. J.; Liu, J. L.

doi:10.1063/1.2194870

Cited by 98 publications

(59 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The resulting nonstoichiometry is known to strongly influence the electronic properties through upward band-bending effects and the creation of active surface sites [14,15]. It is also relevant to mention here the amphoteric properties of ZnO which influence both its chemical behavior [16] and its electronic properties upon doping [17]. Furthermore, ZnO has interesting optical properties, due to its direct band-gap of 3.3 eV and a large binding exciton binding energy of 60 meV.…”

Section: Homentioning

confidence: 99%

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Mosnier

O’Haire

McGlynn

et al. 2009

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

We found that a ZnO film of 2 µm thickness which was laser-deposited at room temperature onto a plain soda lime glass substrate, exhibits notable antibacterial activity against a biofilm of Staphylococcus epidermidis when back-illuminated by a UVA light source with a peak emission wavelength of about 365 nm. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), UV-visible absorption spectroscopy, Raman spectroscopy and x-ray photoemission spectroscopy (XPS) were used to characterize the ZnO films before and after the interactions with the biofilm and the ultraviolet light, respectively. The as-deposited film was highly textured with the wurtzite (0002) in-plane orientation (c-axis perpendicular to ZnO surface) and had a surface rms roughness of 49.7 nm. In the as-deposited film, the Zn to O ratio was 1 to 0.95. After the UV and biofilm treatments, the ZnO film surface had become rougher (rms roughness 68.1 nm) and presented uniform micron-sized pitting randomly distributed, while the zinc to oxygen ratio had become 1 to 2.2. In this case, both the UV-visible and Raman spectra pointed to degradation of the structural quality of the material. On the strength of these data, we propose a model for the mediation of the bactericidal activity in which the photogeneration of highly oxidizing species and the presence of active surface defect sites both play an important role. This study is of particular interest for the acute problem of disinfection of pathogenic biofilms which form on medical device/implant surfaces.

show abstract

Section: Homentioning

confidence: 99%

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Mosnier

O’Haire

McGlynn

et al. 2009

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Относительно природы поло-сы 374 nm (3.31 eV) в литературе нет единого мнения. Энергетическое положение полосы позволяет связы-вать ее с несколькими излучательными процессами, в частности, с излучением 1LO-свободного экситона [1], с переходом свободный электрон−акцептор [13][14][15], с излучением связанных экситонов, в локализованных на акцепторе [16,17] с двухэлектронными процессами в излучении связанных экситонов [18] и др. Поло-са наблюдается в широком температурном интервале от гелиевых до комнатных температур.…”

Section: рисunclassified

Фотоиндуцированные эффекты в спектрах люминесценции ZnO

Акопян¹,

Лабзовская²,

Novikov³

et al. 2018

Физика Твердого Тела

View full text Add to dashboard Cite

The effect of intense UV irradiation on the photoluminescence (PL) spectra of ZnO powders and nanocrystalline films obtained by atomic layer deposition (ALD) was investigated. At room temperature, the behavior of the spectra under continuous UV irradiation in multiple vacuum-atmosphere cycles was studied. The changes in the intensities of exciton radiation and radiation in the “green” band region, associated with the phenomena of oxygen photodesorption and photoadsorption, are discussed. In the temperature range of 5–300 K, the effect of strong UV irradiation on the near-edge luminescence spectrum of ZnO films was studied. The nature of a new line arising in the photoluminescence spectra of an irradiated film in the region of emission of bound excitons is discussed.

show abstract

“…24,34,35 The 3.31 eV emission band commonly observed in undoped and doped ZnO has been suggested as being related to SFs, 36 but also been reported to be attributed to various electron-acceptor pair and exciton transitions. [37][38][39][40] Most reports of p-type ZnO have been for group V elements including N, 41-44 P, 45,46 As, [47][48][49] and Sb 50,51 dopants. The low temperature (LT) PL of the p-type samples utilizing these dopants includes emissions in the energy range of 3.3-3.35 eV.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence study of p-type vs. n-type Ag-doped ZnO films

Myers

Khranovskyy

Jian

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

Silver doped ZnO films have been grown on sapphire (0001) substrates by pulsed laser deposition.Hall measurements indicate that p-type conductivity is realized for the films deposited at 500 C and 750 C. Transmission electron microscopy images show more obvious and higher density of stacking faults (SFs) present in the p-type ZnO films as compared to the n-type films. Top view and cross sectional photoluminescence of the n-and p-type samples revealed free excitonic emission from both films. A peak at 3.314 eV, attributed to SF emission, has been observed only for the n-type sample, while a weak neutral acceptor peak observed at 3.359 eV in the p-type film. The SF emission in the n-type sample suggests localization of acceptor impurities nearby the SFs, while lack of SF emission for the p-type sample indicates the activation of the Ag acceptors in ZnO.

show abstract

Donor and acceptor competitions in phosphorus-doped ZnO

Cited by 98 publications

References 25 publications

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

ZnO films grown by pulsed-laser deposition on soda lime glass substrates for the ultraviolet inactivation of Staphylococcus epidermidis biofilms

Фотоиндуцированные эффекты в спектрах люминесценции ZnO

Photoluminescence study of p-type vs. n-type Ag-doped ZnO films

Contact Info

Product

Resources

About