Chin. J. Semicond. > 2007, Volume 28 > Issue 7 > 1121-1124

PAPERS

Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED

Chen Zhizhong, Xu Ke, Qin Zhixin, Yu Tongjun, Tong Yuzhen, Song Jinde, Lin Liang, Liu Peng, Qi Shengli and Zhang Guoyi

+ Author Affiliations

PDF

Abstract: InGaN/GaN multiple quantum well (MQW) light emitting diode (LED) wafers with two emission peaks were grown by MOCVD.Transmission electron microscopy (TEM),electroluminescence (EL),and cathodoluminescence (CL) measurements were performed to study the recombination mechanism of the InGaN QWs.It was found that there are different widths of quantum wells in TEM images.Green and blue emissions were separately observed in the EL spectra,which are located at 2.45 and 2.81eV,respectively.The wavelengths for both the blue and green emission do not shift until the injection level reaches 2e4mA/cm2.In monochromatic CL images,the green emission comes from randomly distributed dots and floccules that occupy almost the whole surface.The blue emission comes from the floccules only.It can be concluded that the blue emission is attributed to the irradiative recombination in the QWs,and the green emission is attributed to that in wider QWs and In-rich QDs.

Key words: gallium nitridelight emitting diodemultiple quantum wellstransmission electron microscopyelectroluminescencecathodoluminescence

  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 3936 Times PDF downloads: 1384 Times Cited by: 0 Times

    History

    Received: 18 August 2015 Revised: 07 March 2007 Online: Published: 01 July 2007

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Chen Zhizhong, Xu Ke, Qin Zhixin, Yu Tongjun, Tong Yuzhen, Song Jinde, Lin Liang, Liu Peng, Qi Shengli, Zhang Guoyi. Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED[J]. Journal of Semiconductors, 2007, 28(7): 1121-1124. ****Chen Z Z, Xu K, Qin Z X, Yu T J, Tong Y Z, Song J D, Lin L, Liu P, Qi S L, Zhang G Y. Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED[J]. Chin. J. Semicond., 2007, 28(7): 1121.
      Citation:
      Chen Zhizhong, Xu Ke, Qin Zhixin, Yu Tongjun, Tong Yuzhen, Song Jinde, Lin Liang, Liu Peng, Qi Shengli, Zhang Guoyi. Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED[J]. Journal of Semiconductors, 2007, 28(7): 1121-1124. ****
      Chen Z Z, Xu K, Qin Z X, Yu T J, Tong Y Z, Song J D, Lin L, Liu P, Qi S L, Zhang G Y. Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED[J]. Chin. J. Semicond., 2007, 28(7): 1121.

      Origins of Double Emission Peaks in Electroluminescence Spectrum from InGaN/GaN MQW LED

      • Received Date: 2015-08-18
      • Accepted Date: 2006-12-16
      • Revised Date: 2007-03-07
      • Published Date: 2007-07-05

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return