Molecular engineering for high-performance fullerene broadband photodetectors,Nanoscale Advances

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Molecular engineering for high-performance fullerene broadband photodetectors
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-12-31 , DOI: 10.1039/d0na00981d
Mingming Su _{1,

2,

3,

4,

5} , Yajing Hu _{1,

2,

3,

4,

5} , Ao Yu _{1,

2,

3,

4,

5} , Zhiyao Peng _{1,

2,

3,

4,

5} , Wangtao Long _{1,

2,

3,

4,

5} , Shixin Gao _{1,

2,

3,

4,

5} , Ping Peng _{1,

2,

3,

4,

5} , Bin Su _{1,

2,

3,

4,

5} , Fang-Fang Li _{1,

2,

3,

4,

5}

Affiliation

Broadband photodetectors fabricated with organic molecules have the advantages of low cost, high flexibility, easy processing and low-temperature requirement. Fullerene molecules, due to their electron accepting and photoinduced electron transfer properties, are potential materials for photodetectors. However, fullerene has a narrow light absorption spectrum range, and realization of large-area fullerene-based broadband photodetectors remains a challenge. Herein, we broaden the absorption wavelength range of fullerene through molecular engineering, i.e. adding a donor molecule, nickel tetraphenylporphyrin (NiTPP) with strong visible light absorption capacity, onto the fullerene cage to form a donor–acceptor dyad (NiTPP-C₆₀). Moreover, large-area nickel porphyrin–fullerene (NiTPP-C₆₀) single-crystal arrays were prepared by applying a liquid-bridge induced assembly method. Combining the excellent visible light absorption properties of porphyrin and the good electron transport characteristic of fullerene, photodetectors fabricated with NiTPP-C₆₀ single-crystal arrays show a fast photoelectric response with τ_on < 0.09 s at 350 nm, τ_on < 0.10 s at 425 nm and τ_on < 0.08 s at 530 nm, and the highest responsivity of 11.9 A W⁻¹ at 425 nm. This study provides a new strategy toward the fabrication of high-performance fullerene broadband photodetectors and presents a versatile method for the design of large-area well-aligned organic single-crystal arrays for practical electronic applications.

中文翻译：

高性能富勒烯宽带光电探测器的分子工程

用有机分子制造的宽带光电探测器具有成本低，灵活性高，易于加工，对温度要求低的优点。富勒烯分子由于其电子接受和光致电子转移特性而成为光电探测器的潜在材料。然而，富勒烯具有窄的光吸收光谱范围，并且大面积基于富勒烯的宽带光电检测器的实现仍然是挑战。在这里，我们通过分子工程拓宽了富勒烯的吸收波长范围，即在富勒烯笼子上添加了一个供体分子，具有很强的可见光吸收能力的四苯基卟啉镍（NiTPP），形成了一个供体-受体二元组（NiTPP-C ₆₀）。此外，大面积的卟啉-富勒烯镍（NiTPP-C₆₀）通过应用液桥诱导组装法制备单晶阵列。结合卟啉的优异的可见光的光吸收特性和富勒烯的良好的电子传输特性，光检测器与NiTPP-C制成₆₀单晶阵列示出了具有快速光电响应τ_上在350nm处，<0.09秒。 τ_上<0.10 s的425纳米和τ_上<0.08 s的530纳米，和11.9 AW的最高响应^-1在425 nm 这项研究为高性能的富勒烯宽带光电探测器的制造提供了一种新的策略，并提出了一种用于实际电子应用的大面积排列良好的有机单晶阵列设计的通用方法。

更新日期：2021-01-19

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