Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures

doi:10.1088/1674-1056/23/10/108101

›› 2014, Vol. 23 ›› Issue (10): 108101-108101.doi: 10.1088/1674-1056/23/10/108101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures

Ramin Yousefi^a, Mohsen Cheragizade^b, Farid Jamali-Sheini^c, M. R. Mahmoudian^d, Abdolhossein Saaédi^b, Nay Ming Huang^e

a Depertment of Physics, Masjed-Soleiman Branch, Islamic Azad University (I. A. U.), Masjed-Soleiman, Iran;
b Department of Electrical Engineering, Bushehr Branch, Islamic Azad University (I. A. U.), Bushehr, Iran;
c Department of Physics, Ahwaz Branch, Islamic Azad University, Ahwaz, Iran;
d Department of Chemistry, Shahid Sherafat, University of Farhangian, 15916 Tehran, Iran;
e Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

收稿日期:2014-01-15 修回日期:2014-04-20 出版日期:2014-10-15 发布日期:2014-10-15

Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures

Ramin Yousefi^a, Mohsen Cheragizade^b, Farid Jamali-Sheini^c, M. R. Mahmoudian^d, Abdolhossein Saaédi^b, Nay Ming Huang^e

a Depertment of Physics, Masjed-Soleiman Branch, Islamic Azad University (I. A. U.), Masjed-Soleiman, Iran;
b Department of Electrical Engineering, Bushehr Branch, Islamic Azad University (I. A. U.), Bushehr, Iran;
c Department of Physics, Ahwaz Branch, Islamic Azad University, Ahwaz, Iran;
d Department of Chemistry, Shahid Sherafat, University of Farhangian, 15916 Tehran, Iran;
e Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

Received:2014-01-15 Revised:2014-04-20 Online:2014-10-15 Published:2014-10-15
Contact: Ramin Yousefi E-mail:yousefi.ramin@gmail.com,_raminyousefi@iaumis.ac.ir
About author:81.15.Gh; 61.72.uf; 61.72.uj; 78.55.-m

摘要/Abstract

摘要： Selenium and zinc are used as anionic and cationic dopant elements to dope PbS nanostructures. The undoped and doped PbS nanostructures are grown using a thermal evaporation method. Scanning electron microscopy (SEM) results show similar morphologies for the undoped and doped PbS nanostructures. X-ray diffraction (XRD) patterns of three sets of the nanostructures indicate that these nanostructures each have a PbS structure with a cubic phase. Evidence of dopant incorporation is demonstrated by X-ray photoelectron spectroscopy (XPS). Raman spectra of the synthesized samples confirm the XRD results and indicate five Raman active modes, which relate to the PbS cubic phase for all the nanostructures. Room temperature photoluminescence (PL) and UV-Vis spectrometers are used to study optical properties of the undoped and doped PbS nanostructures. Optical characterization shows that emission and absorption peaks are in the infrared (IR) region of the electromagnetic spectrum for all PbS nanostructures. In addition, the optical studies of the doped PbS nanostructures reveal that the band gap of the Se-doped PbS is smaller, and the band gap of the Zn-doped PbS is bigger than the band gap of the undoped PbS nanostructures.

关键词: PbS nanostructures, anionic dopant, cationic dopant, thermal evaporation, optical properties

Abstract: Selenium and zinc are used as anionic and cationic dopant elements to dope PbS nanostructures. The undoped and doped PbS nanostructures are grown using a thermal evaporation method. Scanning electron microscopy (SEM) results show similar morphologies for the undoped and doped PbS nanostructures. X-ray diffraction (XRD) patterns of three sets of the nanostructures indicate that these nanostructures each have a PbS structure with a cubic phase. Evidence of dopant incorporation is demonstrated by X-ray photoelectron spectroscopy (XPS). Raman spectra of the synthesized samples confirm the XRD results and indicate five Raman active modes, which relate to the PbS cubic phase for all the nanostructures. Room temperature photoluminescence (PL) and UV-Vis spectrometers are used to study optical properties of the undoped and doped PbS nanostructures. Optical characterization shows that emission and absorption peaks are in the infrared (IR) region of the electromagnetic spectrum for all PbS nanostructures. In addition, the optical studies of the doped PbS nanostructures reveal that the band gap of the Se-doped PbS is smaller, and the band gap of the Zn-doped PbS is bigger than the band gap of the undoped PbS nanostructures.

Key words: PbS nanostructures, anionic dopant, cationic dopant, thermal evaporation, optical properties

中图分类号: (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))

81.15.Gh

61.72.uf (Ge and Si) 61.72.uj (III-V and II-VI semiconductors) 78.55.-m (Photoluminescence, properties and materials)

Ramin Yousefi, Mohsen Cheragizade, Farid Jamali-Sheini, M. R. Mahmoudian, Abdolhossein Saaédi, Nay Ming Huang. Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures[J]. , 2014, 23(10): 108101-108101.

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Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures

Influences of anionic and cationic dopants on the morphology andoptical properties of PbS nanostructures

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