Science China Chemistry

, Volume 56, Issue 5, pp 583–587 | Cite as

Novel internal photoemission in manganite/ZnO heterostructure

  • JiaQi Zhang
  • KeKe Huang
  • WenZhe Si
  • XiaoFeng Wu
  • Gang Cheng
  • ShouHua Feng
Articles
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Abstract

A novel photovoltaic phenomenon of internal photoemission was found in a low cost manganite La0.62Ca0.29K0.09MnO3 (LCKMO)/zinc oxide (ZnO) heterojunction bilayers grown on ITO substrate by pulsed laser deposition (PLD) at relative low growth temperature. The heterostructure ITO/LCKMO/ZnO/Al exhibits reproducible rectifying characteristics and light current under continuous laser irradiation of λ = 325 nm. We report here the influence of LCKMO/ZnO bilayers’ thickness on the electrical and photoelectric properties of the heterostructure at room temperature. The power conversion efficiency (PCE) is achieved when the LCKMO and ZnO layers are thin enough or the full space charge layer is sufficient. We obtained the maximum value of PCE of 0.0145% when the thicknesses of LCKMO and ZnO layers are 25 and 150 nm, respectively. The open circuit voltage is 0.04 V under this condition due to the internal photoemission.

Keywords

heterojunction photoelectric manganite ZnO 
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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • JiaQi Zhang
    • 1
  • KeKe Huang
    • 1
  • WenZhe Si
    • 1
  • XiaoFeng Wu
    • 1
  • Gang Cheng
    • 1
  • ShouHua Feng
    • 1
  1. 1.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin UniversityChangchunChina

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