In：ZnO nanoparticles are prepared by the sol-gel process. The ratios of In/（Zn＋In） are 0%, 5%, 8%, 10%, and 15%, respectively. Crystal phase structures and optoelectronic properties of these samples are characteri...In：ZnO nanoparticles are prepared by the sol-gel process. The ratios of In/（Zn＋In） are 0%, 5%, 8%, 10%, and 15%, respectively. Crystal phase structures and optoelectronic properties of these samples are characterized and the chromaticity coordinates of different samples are also calculated in CIE-XYZ colour system. The results show that preferred growth direction of ZnO changes from （002） plane to （001） plane and interplanar distance becomes shorter. When the doping amount of In is 5%, Zn atoms are completely replaced by In atoms. The resistivities of the samples first decrease, then increase afterwards with the increase of the amount of In. With the increase of In, the ultraviolet emission is redshifted and new peaks occur at 465 nm, 535 nm, and 630 nm. The sample with 10% indium has white-light emission. The band structures of samples with 0% and 12.5% indium are investigated by the first principle method. The mechanism of white emission is discussed from the viewpoint of additional energy levels.展开更多
This paper utilizes the brightness-voltage waveform curve to investigate the primary electron in solid state cathodoluminescence. The results indicate that the primary electron is from the interface state of SiO2/MEH-...This paper utilizes the brightness-voltage waveform curve to investigate the primary electron in solid state cathodoluminescence. The results indicate that the primary electron is from the interface state of SiO2/MEH-PPV （Poly[2- methoxy-5-（2-ethylhexyloxy）-1,4-phenylenevinylene]） under the lower electric field which contributes to the 580-nm emission. With increasing the electric field, the 405-nm emission is obtained, and under this condition, the origin of the primary electron is mainly from tunneling.展开更多
基金supported by the Natural Science Foundation of Shandong Province of China (Grant No. Y2007G14)the Science and Technology Development Projects of Shandong Province of China (Grant Nos. 2009GG2003028 and 2010G0020423)+2 种基金the Doctoral Foundation of University of Jinan,China (Grant No. XBS0845)the Key Laboratory of Luminescence and Optical Information,Ministry of Education,Beijing Jiaotong University,China (Grant No. 2010L0101)the Scientific Research Foundation of University of Jinan,China (Grant No. XKY1029)
文摘In：ZnO nanoparticles are prepared by the sol-gel process. The ratios of In/（Zn＋In） are 0%, 5%, 8%, 10%, and 15%, respectively. Crystal phase structures and optoelectronic properties of these samples are characterized and the chromaticity coordinates of different samples are also calculated in CIE-XYZ colour system. The results show that preferred growth direction of ZnO changes from （002） plane to （001） plane and interplanar distance becomes shorter. When the doping amount of In is 5%, Zn atoms are completely replaced by In atoms. The resistivities of the samples first decrease, then increase afterwards with the increase of the amount of In. With the increase of In, the ultraviolet emission is redshifted and new peaks occur at 465 nm, 535 nm, and 630 nm. The sample with 10% indium has white-light emission. The band structures of samples with 0% and 12.5% indium are investigated by the first principle method. The mechanism of white emission is discussed from the viewpoint of additional energy levels.
基金Project supported by the Doctoral Foundation of University of Jinan (Grant No.XBS0845)the Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University)+2 种基金Ministry of Education,China (Grant No.2010LOI01)the Natural Science Foundation of Shandong Province,China (Grant Nos.Y2008A21 and SZR0704)the Scientific Research Foundation of the Education Department of Shandong Province,China (Grant No.J08LI12)
文摘This paper utilizes the brightness-voltage waveform curve to investigate the primary electron in solid state cathodoluminescence. The results indicate that the primary electron is from the interface state of SiO2/MEH-PPV （Poly[2- methoxy-5-（2-ethylhexyloxy）-1,4-phenylenevinylene]） under the lower electric field which contributes to the 580-nm emission. With increasing the electric field, the 405-nm emission is obtained, and under this condition, the origin of the primary electron is mainly from tunneling.
