Sensitive and Robust Ultraviolet Photodetector Array Based on Self-Assembled Graphene/C-60 Hybrid Films
Sensitive and Robust Ultraviolet Photodetector Array Based on Self-Assembled Graphene/C-60 Hybrid Films
复制标题
基于自组装石墨烯/C-60 混合薄膜的灵敏且鲁棒的紫外光电探测器阵列
DOI：
10.1021/acsami.8b11596
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发表时间：
2018
影响因子：
9.5
通讯作者：
Wang Fengqiu
中科院分区：
文献类型：
--
作者：
Qin Shuchao;Chen Xiaoqing;Du Qianqian;Nie Zhonghui;Wang Xinran;Lu Hai;Wang Xizhang;Liu Kaihui;Xu Yongbing;Shi Yi;Zhang Rong;Wang Fengqiu
Graphene has been widely investigated for use in high-performance photodetectors due to its broad absorption band and high carrier mobility. While exhibiting remarkably strong absorption in the ultraviolet range, the fabrication of a large-scale integrable, graphene-based ultraviolet photodetector with long-term stability has proven to be a challenge. Here, using graphene as a template for C60assembly, we synthesized a large-scale all-carbon hybrid film with inherently strong and tunable UV aborption. Efficient exciton dissociation at the heterointerface and enhanced optical absorption enables extremely high photoconductive gain, resulting in UV photoresponsivity of ∼107A/W. Interestingly, due to the electron–hole recombination process at the heterointerface, the response time can be modulated by the gate voltage. More importantly, the use of all-carbon hybrid materials ensures robust operation and further allows the demonstration of an exemplary 5 × 5 (2-dimensional) photodetector array. The devices exhibit negligible degradation in figures of merit even after 2 month of operation, indicating excellent environmental robustness. The combination of high responsivity, reliability, and scalable processability makes this new all-carbon film a promising candidate for future integrable optoelectronics.
