New Ultraviolet Photodetector Based on Individual Nb2O5 Nanobelts

Although human eyes are quite insensitive to ultraviolet (UV) light, most of the longer wavelength UV light (the UV‐A band between 320 and 400 nm) does reach the earth surface and after prolonged exposure, the radiation can cause health concerns especially skin cancer. Therefore, it is extremely important to explore ways to effectively monitor the radiation. Herein we report for the first time a new high‐performance UV photodetector made of an individual Nb2O5 nanobelt. Quasi‐aligned Nb2O5 nanobelts 100–500 nm wide and 2–10 μm long were synthesized using a hydrothermal treatment of a niobium foil in a KOH solution followed by proton exchange and calcination treatment. A nanostructured photodetector was constructed from an individual Nb2O5 nanobelt and its optoelectronic properties were evaluated. The detector exhibited linear photocurrent characteristics, excellent light selectivity, and high external quantum‐efficiency (EQE) of 6070%. Long‐term stability of the photocurrent over a period of 2500 s at an applied voltage of 1.0 V was achieved. The photodetector performance was further enhanced by improving the crystallinity and eliminating the defects in the Nb2O5 nanobelt crystals. These excellent optoelectronic properties demonstrate that Nb2O5 nanobelts are suitable for visible‐blind UV‐light sensors and optoelectronic circuits, especially those operating in the UV‐A range.

[1]  Meiyong Liao,et al.  Ultrahigh external quantum efficiency from thin SnO2 nanowire ultraviolet photodetectors. , 2011, Small.

[2]  Liang Li,et al.  ZnS nanostructures: From synthesis to applications , 2011 .

[3]  Tianyou Zhai,et al.  Ultrahigh‐Performance Solar‐Blind Photodetectors Based on Individual Single‐crystalline In2Ge2O7 Nanobelts , 2010, Advanced materials.

[4]  Ichiro Yamada,et al.  Efficient Assembly of Bridged β‐Ga2O3 Nanowires for Solar‐Blind Photodetection , 2010 .

[5]  Chunru Wang,et al.  High performance ultraviolet photodetectors based on an individual Zn2SnO4 single crystalline nanowire , 2010 .

[6]  Tianyou Zhai,et al.  Single‐Crystalline Sb2Se3 Nanowires for High‐Performance Field Emitters and Photodetectors , 2010, Advanced materials.

[7]  Chun Xing Li,et al.  Solution synthesis of large-scale, high-sensitivity ZnO/Si hierarchical nanoheterostructure photodetectors. , 2010, Journal of the American Chemical Society.

[8]  Y. Bando,et al.  Electrical Transport and High‐Performance Photoconductivity in Individual ZrS2 Nanobelts , 2010, Advanced materials.

[9]  Yu‐Guo Guo,et al.  Synthesis of monodispersed wurtzite structure CuInSe2 nanocrystals and their application in high-performance organic-inorganic hybrid photodetectors. , 2010, Journal of the American Chemical Society.

[10]  Y. Bando,et al.  Single‐Crystalline CdS Nanobelts for Excellent Field‐Emitters and Ultrahigh Quantum‐Efficiency Photodetectors , 2010, Advanced materials.

[11]  Lide Zhang,et al.  One-dimensional inorganic semiconductor nanostructures: A new carrier for nanosensors , 2010 .

[12]  Hongzheng Chen,et al.  High efficient UV-A photodetectors based on monodispersed ligand-capped TiO2 nanocrystals and polyfluorene hybrids , 2010 .

[13]  A. Govindaraj,et al.  Unipolar assembly of zinc oxide rods manifesting polarity-driven collective luminescence , 2010, Proceedings of the National Academy of Sciences.

[14]  Haoshen Zhou,et al.  Centimeter‐Long V2O5 Nanowires: From Synthesis to Field‐Emission, Electrochemical, Electrical Transport, and Photoconductive Properties , 2010, Advanced materials.

[15]  N. Marzari,et al.  Ultraviolet Photodetectors Based on Anodic TiO2 Nanotube Arrays , 2010 .

[16]  G. Konstantatos,et al.  Nanostructured materials for photon detection. , 2010, Nature nanotechnology.

[17]  P. Kamat,et al.  A CdSe Nanowire/Quantum Dot Hybrid Architecture for Improving Solar Cell Performance , 2010 .

[18]  Hongzheng Chen,et al.  Highly efficient ultraviolet photodetectors based on TiO2 nanocrystal–polymer composites via wet processing , 2010, Nanotechnology.

[19]  Yi Cui,et al.  CuInS(2) solar cells by air-stable ink rolling. , 2010, Journal of the American Chemical Society.

[20]  Ming Fang,et al.  Nanomaterials in pollution trace detection and environmental improvement , 2010 .

[21]  S. Nahm,et al.  Synthesis of ZnxCd1−xSe (0 ≤ x ≤ 1) alloyed nanowires for variable-wavelength photodetectors , 2010 .

[22]  Y. Bando,et al.  An Efficient Way to Assemble ZnS Nanobelts as Ultraviolet‐Light Sensors with Enhanced Photocurrent and Stability , 2010 .

[23]  Liping Huang,et al.  Synthesis and Photoelectric Properties of Coaxial Schottky Junctions of ZnS and Carbon Nanotubes , 2010 .

[24]  Yitai Qian,et al.  High‐Performance Blue/Ultraviolet‐Light‐Sensitive ZnSe‐Nanobelt Photodetectors , 2009, Advanced materials.

[25]  F. Xia,et al.  Ultrafast graphene photodetector. , 2009, Nature nanotechnology.

[26]  Tianyou Zhai,et al.  ZnO and ZnS Nanostructures: Ultraviolet-Light Emitters, Lasers, and Sensors , 2009 .

[27]  Guozhong Cao,et al.  ZnO Nanostructures for Dye‐Sensitized Solar Cells , 2009 .

[28]  Zhongfan Liu,et al.  Tunable hybrid photodetectors with superhigh responsivity. , 2009, Small.

[29]  Yu‐Guo Guo,et al.  High performance photodetectors of individual InSe single crystalline nanowire. , 2009, Journal of the American Chemical Society.

[30]  Takashi Sekiguchi,et al.  Single‐Crystalline ZnS Nanobelts as Ultraviolet‐Light Sensors , 2009 .

[31]  Tsung-Tsong Wu,et al.  A ZnO nanorod-based SAW oscillator system for ultraviolet detection , 2009, Nanotechnology.

[32]  J. Zou,et al.  Field Emission and Cathodoluminescence of ZnS Hexagonal Pyramids of Zinc Blende Structured Single Crystals , 2009 .

[33]  Xindong Zhang,et al.  Role of tungsten oxide in inverted polymer solar cells , 2009 .

[34]  Y. Bando,et al.  Solvothermal Synthesis, Cathodoluminescence, and Field‐Emission Properties of Pure and N‐Doped ZnO Nanobullets , 2009 .

[35]  Lin-Bao Luo,et al.  Photoconductivity of a Single Small‐Molecule Organic Nanowire , 2008 .

[36]  U. Wiesner,et al.  Highly crystalline inverse opal transition metal oxides via a combined assembly of soft and hard chemistries. , 2008, Journal of the American Chemical Society.

[37]  C. Lim,et al.  Nb2O5 Nanowires as Efficient Electron Field Emitters , 2008 .

[38]  James C Blakesley,et al.  Solution-processed ultraviolet photodetectors based on colloidal ZnO nanoparticles. , 2008, Nano letters.

[39]  Wei Lu,et al.  Doping-dependent electrical characteristics of SnO2 nanowires. , 2008, Small.

[40]  Dmitri Golberg,et al.  Inorganic semiconductor nanostructures and their field-emission applications , 2008 .

[41]  Ruyan Guo,et al.  ZnO microtube ultraviolet detectors , 2008 .

[42]  Shui-Tong Lee,et al.  Photoresponse Properties of CdSe Single‐Nanoribbon Photodetectors , 2007 .

[43]  Jiafa Cai,et al.  High-performance 4H-SiC-based ultraviolet p-i-n photodetector , 2007 .

[44]  Hailin Xue,et al.  TiO2 based metal-semiconductor-metal ultraviolet photodetectors , 2007 .

[45]  Yang-Kyu Choi,et al.  Chemical sensors based on nanostructured materials , 2007 .

[46]  C. Soci,et al.  ZnO nanowire UV photodetectors with high internal gain. , 2007, Nano letters.

[47]  Zhong Lin Wang,et al.  Single-crystalline branched zinc phosphide nanostructures: synthesis, properties, and optoelectronic devices. , 2007, Nano letters.

[48]  S. R. Silva,et al.  Structural and optoelectronic properties of C60 rods obtained via a rapid synthesis route , 2006 .

[49]  Zhong Lin Wang,et al.  Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire Arrays , 2006, Science.

[50]  Jiwoong Park,et al.  Scanning photocurrent imaging and electronic band studies in silicon nanowire field effect transistors. , 2005, Nano letters.

[51]  Tongtong Wang,et al.  CdS nanobelts as photoconductors , 2005 .

[52]  Yu Huang,et al.  Nanowires for integrated multicolor nanophotonics. , 2004, Small.

[53]  D. Mihailovic,et al.  Field-emission properties of quasi-one-dimensional NbOx crystals , 2004 .

[54]  Younan Xia,et al.  One‐Dimensional Nanostructures: Synthesis, Characterization, and Applications , 2003 .

[55]  Peidong Yang,et al.  Photochemical sensing of NO(2) with SnO(2) nanoribbon nanosensors at room temperature. , 2002, Angewandte Chemie.

[56]  Peidong Yang,et al.  Nanowire ultraviolet photodetectors and optical switches , 2002 .

[57]  Kazuki Yoshimura,et al.  Characterization of niobium oxide electrochromic thin films prepared by reactive d.c. magnetron sputtering , 1996 .

[58]  C. Lampert,et al.  Preparation and properties of spin-coated Nb2O5 films by the sol-gel process for electrochromic applications , 1996 .

[59]  K. H. Chen,et al.  Recent advances in wide bandgap semiconductor biological and gas sensors , 2009 .