Abstract
The photovoltaic properties of miscut La2/3Ca1/3MnO3films were systematically investigated with different bias voltage (Vb) and load resistance (RS). The photoresponse depended strongly onVbandRSand was improved greatly by increasingVbandRS. The maximum photovolvaic sensitivity reached 62.5 mV/mJ. The present results suggested the promising potential of increasingVbandRSin high-sensitivity detectors.
Highlights
Hydrocarbon resource is important and strategic for the national modernization, defense, and security
Ultrafast photovoltaic effect has been observed in manganite oxide with a picosecond response time, which was due to a combination mechanism of photoinduced carriers and Seebeck effect [7,8,9]
To improve the photosensitivity of manganite films and meet the needs of oil and gas optical engineering, we focused on load-resistance- (RS-) and bias-voltage(Vb-) tunable lateral photovoltages of La2/3Ca1/3MnO3 (LCMO) films grown on miscut LaSrAlO4 (LSAO) substrates with 10◦ tilted to [001] direction of LSAO
Summary
Hydrocarbon resource is important and strategic for the national modernization, defense, and security. Present concept of Digital Oilfield suggests that an optical detector in oil well can operate at high temperature upto ∼500◦C and high pressure upto ∼100 MPa with high-speed response. Ultrafast photovoltaic effect has been observed in manganite oxide with a picosecond response time, which was due to a combination mechanism of photoinduced carriers and Seebeck effect [7,8,9]. To improve the photosensitivity of manganite films and meet the needs of oil and gas optical engineering, we focused on load-resistance- (RS-) and bias-voltage(Vb-) tunable lateral photovoltages of La2/3Ca1/3MnO3 (LCMO) films grown on miscut LaSrAlO4 (LSAO) substrates with 10◦ tilted to [001] direction of LSAO. The laser-induced voltage (LIV) depended strongly on Vb and RS.
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