Visible-blind ultraviolet narrowband photomultiplication-type organic photodetector with an ultrahigh external quantum efficiency of over 1 000 000%

Abstract

The visible-blind ultraviolet (UV) photodetector can detect UV signals and is not interfered by visible light or infrared light in the environment. In order to realize high-performance visible-blind UV organic...

Low-power supralinear photocurrent generation via excited state fusion in single-component nanostructured organic photodetectors

“…64 Moreover, the capability of PtOEP to activate photocurrent via self-TTA reactions is an added value to be utilized by a manifold of smart light-management photonic devices. A broad gamut of applications is envisioned including the use of TTA interlayers for sensitizing visible-blind photodetecting devices, 72 stimulating neuromorphic 73 and light-gated neural circuitries, 74 and augmenting light-driven photocatalytic tandem platforms. 75 The realization of those device architectures would be simplified greatly by the deposition of TTA interlayers via solution processing techniques.…”

Recent Advances in Solution‐Processable Organic Photodetectors and Applications in Flexible Electronics

“…For example, a wearable UV light monitor was demonstrated using a visible-blind UV-sensitive PM-type OPD in series with a green OLED. [74] The mechanical stability or robustness is an essential factor in the lifetime of flexible OPDs. The mechanical stability of flexible OPDs is evaluated by cyclic stressing tests, including bending, stretching, and compressing treatment.…”

“…The OPDs with an optimized F8T2:ZnO ratio of 1:3 show a responsivity of 0.224 A W −1 , a narrow FWHM of 16 nm, and a D* of 8.45 × 10 12 Jones at 358 nm under a bias of 3.0 V. Recently, a visible‐blind UV narrowband PM‐type OPD was demonstrated using 80 nm‐thick TAPC:C60 (50:1) as the photoactive layer. [ 74 ] The wide bandgap donor TAPC shows an absorption cutoff wavelength at around 370 nm and the small amount of C60 enables weak absorption to visible light in the photoactive layer. As a result, the UV OPD shows a narrowband response at 335 nm with an FWHM of 36 nm, an EQE of 1.08 × 10 6 %, and a D* of 1.28 × 10 14 Jones.…”

“…For example, a wearable UV light monitor was demonstrated using a visible‐blind UV‐sensitive PM‐type OPD in series with a green OLED. [ 74 ]…”

A porous GaN/MoO3 heterojunction for filter-free, ultra-narrowband ultraviolet photodetection

“…17 However, this common approach has the disadvantages of complicated designs and increased costs, as well as the limited sensitivity and responsivity due to optical transmission attenuation. 18,19 Thus, an ideal narrowband PD should be able to respond to a small bandwidth without using an external optical bandpass filter, i.e., a filter-free narrowband PD. Recently, Zhao et al developed a filter-free narrowband PD with the spectral response range of 680-710 nm by using a synergistic perovskite/polymer layer.…”