Broadband organic phototransistor with high photoresponse from ultraviolet to near-infrared realized via synergistic effect of trilayer heterostructure,Journal of Materials Chemistry C

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Broadband organic phototransistor with high photoresponse from ultraviolet to near-infrared realized via synergistic effect of trilayer heterostructure
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-08-03 00:00:00 , DOI: 10.1039/c8tc02148a
Fobao Huang _{1,

2,

3,

4,

5} , Xin Wang _{1,

2,

3,

4,

5} , Kun Xu _{1,

2,

3,

4,

5} , Yuanlong Liang _{1,

2,

3,

4,

5} , Yingquan Peng _{1,

2,

3,

4,

5} , Guohan Liu _{1,

2,

3,

4,

5}

Affiliation

Broadband photodetectors have attracted tremendous attention in recent years because of their extensive industrial and scientific applications for optoelectronic circuits. However, up until now, developing organic phototransistors with a high photoresponse over the broadband spectrum still remains a great challenge due to the lack of broad spectral photosensitive materials. Herein, we report a high-performance broadband phototransistor by adopting an all-organic trilayer heterostructure as an active structure containing three small organic molecules with mutual-complementary photoabsorption spectra. Utilizing the synergistic effect of the high mobility of a fullerene (C₆₀) channel and strong complementary photoabsorption of a C₆₀/3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA)/tin phthalocyanine (SnPc) trilayer heterostructure, a broad high photoresponse from the ultraviolet-visible to the near-infrared region was realized. The photoresponsivity (R), external quantum efficiency (EQE), specific detectivity (D*), and response time reached up to 56.88 A W⁻¹, 15 704%, 9.15 × 10¹² Jones, and <0.5 ms at an incident light intensity of 2 μW mm⁻², respectively, and the photosensitivity (P_max) to 6.39 × 10⁵ at a light intensity of 150 μW mm⁻², most of which are comparable or even surpass the values achieved by commercial silicon, germanium, and indium gallium arsenide photodetectors, as well as many of inorganic and organic photodetectors reported recently. This synergistic strategy opens up a promising avenue for constructing high-performance all-organic photodetectors with a superior broadband response.

中文翻译：

通过三层异质结构的协同效应实现了从紫外到近红外具有高光响应的宽带有机光电晶体管

宽带光电探测器由于其在光电子电路中的广泛的工业和科学应用，近年来引起了极大的关注。但是，到目前为止，由于缺乏宽光谱的光敏材料，开发在宽带光谱上具有高光响应的有机光电晶体管仍然是一个巨大的挑战。本文中，我们通过采用全有机三层异质结构作为包含三个具有互补光吸收光谱的有机小分子的活性结构来报告高性能宽带光电晶体管。利用富勒烯（C的高迁移率的协同效应₆₀是C的）信道和强互补光吸收₆₀/ 3,4,9,10-per四甲酸二酐（PTCDA）/酞菁锡（SnPc）三层异质结构，实现了从紫外可见光到近红外光的宽广光响应。的光响应（[R ），外部量子效率（EQE），特定探测（d *），和响应时间达到高达56.88 AW ^-1，15 704％，9.15×10 ¹²在与入射光强度Jones和<0.5毫秒分别为2μWmm ^-2和在150μWmm ^-2的光强度下的光敏度（P _max）为6.39×10 ⁵。，其中大多数可与甚至超过商用硅，锗和铟镓砷化镓光电探测器以及最近报道的许多无机和有机光电探测器所达到的值。这种协同策略为构建具有出色宽带响应的高性能全有机光电探测器开辟了一条有希望的途径。

更新日期：2018-08-03

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