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Correlation between Surface Charge Accumulation and Excitation Intensity Dependent Red-Shifted Micro-Photoluminescence of Si-Implanted Quartz with Embedded Si Nanocrystals

  • Chun-Jung Lin (a1), Kuo-Cheng Yu (a1), Hao-Chung Kuo (a1), Miao-Jia Ou-yang (a1) and Gong-Ru Lin (a1)...

Abstract

The excitation intensity dependency of nanocrystallite Si (nc-Si) related micro-photoluminescence (μ-PL) from the multi-recipe Si-implanted quartz is characterized. The μ-PL at 724 nm contributed by nc-Si with 3-4 nm diameter is maximized after annealing at 1100°C for 3 hours. By increasing the excitation intensity from 10 kW/cm2 to 300 kW/cm2, the μ-PLs of 1-hr and 3-hr annealed quartz significantly red-shift from 723 nm to 725 nm and from 724 nm to 735 nm, respectively. This can be explained by the anomalous quantum stark effect due to a surface electric field oriented from photo-ionized nc-Si dots to quartz surface. After 1-hr illumination at power of 300 kW/cm2, the μ-PL peak wavelength of 3-hr annealed sample is further red-shifted by 2.5 nm. By measuring the accumulated surface charges built up during optical excitation process, the correlation between excitation-intensity dependent PL wavelength red-shift and the photo-ionized nc-Si surface electric-field related quantum stark effect is primarily elucidated.

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Correlation between Surface Charge Accumulation and Excitation Intensity Dependent Red-Shifted Micro-Photoluminescence of Si-Implanted Quartz with Embedded Si Nanocrystals

  • Chun-Jung Lin (a1), Kuo-Cheng Yu (a1), Hao-Chung Kuo (a1), Miao-Jia Ou-yang (a1) and Gong-Ru Lin (a1)...

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