首页> 美国卫生研究院文献>Nanoscale Research Letters >High-Performance Ultraviolet Photodetector Based on Graphene Quantum Dots Decorated ZnO Nanorods/GaN Film Isotype Heterojunctions
【2h】

High-Performance Ultraviolet Photodetector Based on Graphene Quantum Dots Decorated ZnO Nanorods/GaN Film Isotype Heterojunctions

机译:基于石墨烯量子点的高性能紫外光电检测器装饰ZnO纳米棒/ GaN膜同质异质结

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

A novel isotype heterojunction ultraviolet photodetector was fabricated by growing n-ZnO nanorod arrays on n-GaN thin films and then spin-coated with graphene quantum dots (GQDs). Exposed to UV illumination with a wavelength of 365 nm, the time-dependent photoresponse of the hybrid detectors manifests high sensitivity and consistent transients with a rise time of 100 ms and a decay time of 120 ms. Meanwhile, an ultra-high specific detectivity (up to ~ 1012 Jones) and high photoresponsivity (up to 34 mA W−1) are obtained at 10 V bias. Compared to the bare heterojunction detectors, the excellent performance of the GQDs decorated n-ZnO-GaN heterostructure is attributed to the efficient immobilization of GQDs on the ZnO nanorod arrays. GQDs were exploited as a light absorber and act like an electron donor to effectively improve the effective carrier concentration in interfacial junction. Moreover, appropriate energy band alignment in GQDs decorated ZnO/GaN hybrids can also be a potential factor in facilitating the UV-induced photocurrent and response speed.
机译:通过在n-GaN薄膜上生长n-ZnO纳米棒阵列,然后旋涂石墨烯量子点(GQD),制造出一种新型的同型异质结紫外光电探测器。暴露于波长为365 nm的紫外线照射下,混合探测器的随时间变化的光响应表现出高灵敏度和一致的瞬态,上升时间为100毫秒,衰减时间为120毫秒。同时,在10V偏压下获得了超高的比检测率(高达〜10 12 Jones)和高光响应性(高达34mA W -1 )。与裸异质结检测器相比,GQD装饰的n-ZnO / n-GaN异质结构的出色性能归因于GQD在ZnO纳米棒阵列上的有效固定。 GQD被用作光吸收剂,并像电子供体一样起作用,以有效提高界面连接处的有效载流子浓度。此外,在GQD装饰的ZnO / GaN杂化物中适当的能带排列也可能是促进UV诱导的光电流和响应速度的潜在因素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号