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Development of Thin Film and Nanorod ZnO-Based LEDs and Sensors

  • Stephen J. Pearton (a1), L C Tien (a2), H S Kim (a3), D P Norton (a4), J J Chen (a5), H T Wang (a6), B S Kang (a7), F Ren (a8), W T Lim (a9), J Wright (a10), R Khanna (a11), L F Voss (a12), L Stafford (a13), J Jun (a14) and Jenshan Lin (a15)...

Abstract

The development of new etching and contact metallurgies for the ZnO/ZnMgO/ZnCdO materials system and various approaches for realizing ZnO LEDs are reviewed. ZnO nanorod MOSFETs and pH sensors have been demonstrated. In addition, selective detection of hydrogen with Pt-coated single ZnO nanorods is discussed discussed. The Pt-coated single nanorods show a current response approximately a factor of three larger at room temperature upon exposure to 500ppm H2 in N2 than thin films of ZnO. The power consumption of these sensors can be very small (in the nW range) when using discontinuous coatings of Pt. Once the Pt coating becomes continuous, the current required to operate the sensors increases to the μW range. The ZnO nanorods are insensitive to oxygen in the measurement ambient.

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Keywords

Development of Thin Film and Nanorod ZnO-Based LEDs and Sensors

  • Stephen J. Pearton (a1), L C Tien (a2), H S Kim (a3), D P Norton (a4), J J Chen (a5), H T Wang (a6), B S Kang (a7), F Ren (a8), W T Lim (a9), J Wright (a10), R Khanna (a11), L F Voss (a12), L Stafford (a13), J Jun (a14) and Jenshan Lin (a15)...

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