Manganite-layer thickness-dependent photovoltaic effect of La0.9Sr0.1MnO3/SrNb0.01Ti0.99O3 p–n heterojunction
✍ Scribed by Jie Qiu; Hui-Bin Lu; Kui-Juan Jin; Meng He; Jie Xing
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 411 KB
- Volume
- 400
- Category
- Article
- ISSN
- 0921-4526
No coin nor oath required. For personal study only.
✦ Synopsis
The perovskite p-n heterojunctions were fabricated by depositing La 0.9 Sr 0.1 MnO 3 (LSMO) layers with thicknesses ranging from 20 to 400 A ˚on SrNb 0.01 Ti 0.99 O 3 (SNTO) single-crystal substrates by laser molecular beam epitaxy (laser-MBE). The open-circuit photovoltage of the LSMO/SNTO heterojunction at room temperature increases with the increase of the thickness of LSMO layer. This result is ascribed to the increase of the carrier amount and the enhancement of the built-in electric field in the space-charge region of the LSMO/ SNTO heterojunction with the increase of the thickness of LSMO layer. Furthermore, we found that the speed of photovoltaic response is almost independent of the thickness of LSMO layer in the heterojunction.