Numerical Analysis on Polarization-Induced Doping III-Nitride n-i-p Solar Cells

Ya Ju Lee, Yung Chi Yao, Zu Po Yang

研究成果: 雜誌貢獻文章同行評審

4 引文 斯高帕斯(Scopus)

摘要

We design and numerically evaluate a new type of III-nitride n-i-p solar cells whose p- and n-type regions with equal carrier concentration of 3 × 1018 cm-3 are not generated by extrinsic impurity doping but by the so-called polarization-induced doping, which is induced by the graded InxGa1-xN layers of linearly increasing (from x = 0% to 30%) and decreasing (from x = 30% to 0%) indium composition to construct the conductive p- and n-type regions, respectively. Because of the identical and uniform polarization charges within each unit cell, a smooth spatial variation of the potential profile of the device is, hence, expected, which mitigates the energy band discontinuities at heterointerfaces and facilitates transportation and collection of photogenerated carriers with high efficiency. Most importantly, as the conductive n- and p-type regions are formed by electrostatic field ionization but not by the thermal activation, the concentration of field-induced carriers is independent of thermal freeze-out effects. Thus, the polarization-induced doping III-nitride n-i-p solar cells can provide stable power conversion efficiency, even when operated at low temperatures.

原文英語
文章編號2300108
期刊IEEE Photonics Journal
7
發行號1
DOIs
出版狀態已發佈 - 2015 二月 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

指紋 深入研究「Numerical Analysis on Polarization-Induced Doping III-Nitride n-i-p Solar Cells」主題。共同形成了獨特的指紋。

引用此