Highly Sensitive Organic Photodetectors with Tunable Spectral Response under Bi‐Directional Bias

Miao, Jianli; Zhang, Fujun; Lin, Yuze; Wang, Wenbin; Gao, Mile; Li, Lingliang; Zhang, Jian; Zhan, Xiaowei

doi:10.1002/adom.201600387

Cited by 76 publications

(60 citation statements)

References 25 publications

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“…The photogenerated charge carriers trapped in interfacial traps would produce a Coulomb field, which induces the interfacial band bending to assist tunneling injection of opposite charge carriers from external circuit. The tunneling injection of charge carriers under light illumination may lead to PM phenomenon with EQE of higher than 100% . In addition, several PM models have also been proposed, such as the carrier multiplication via multiple exciton generation, the multiple replenishment of the optically released charge via mobile carriers injected from an Ohmic electrode owing to exciton quenching by localized charges, the hole carrier circulation via the diode induced by electrons trapped in polymer active layer …”

Section: Fundamentals Of Photodetectorsmentioning

confidence: 99%

“…Zhang et al. firstly demonstrated the PM type OPDs with tunable broadband spectral response under bi‐directional bias . The OPDs with structure of ITO/PFN/P3HT:3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone)‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno [2,3‐d:2′,3′‐d′]‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene) (ITIC)(100:1, wt/wt)/Al were fabricated, replacing commonly used PEDOT:PSS with poly[(9,9‐bis(3′‐(N,N‐dimethylamino)propyl)‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene)] (PFN) interfacial layer as the modification of ITO electrode.…”

Section: Research Trends On Pm Type Opdsmentioning

confidence: 99%

“… J–V curves of the OPDs with a) PFN as interfacial layer and b) PEDOT:PSS as interfacial layer in dark and under white light illumination at several different intensities; EQE spectra of OPDs with PFN as interfacial layer under different c) forward biases and d) reverse biases. All panels reproduced with permission . Copyright 2016, Wiley‐VCH.…”

Section: Research Trends On Pm Type Opdsmentioning

confidence: 99%

See 2 more Smart Citations

Recent Progress on Photomultiplication Type Organic Photodetectors

Miao

Zhang

2018

Laser & Photonics Reviews

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210

182

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Photodetectors as a significant unit of intelligent optoelectronic systems have stimulated immense attention from multidisciplinary areas. Photomultiplication (PM) is desirable for sensitive photodetectors with strong detection capability of weak light, which can further simplify the photo‐detection systems without pre‐amplifier circuit. For organic photodetectors (OPDs), PM phenomenon cannot be realized by utilizing the principle of avalanche effect or impact ionization as in inorganic materials, stemming from organic semiconductor materials with large exciton binding energy and disordered structure. In this review, the recent progress on PM type OPDs is comprehensively summarized from the perspective of device physics and material science. Charge tunneling injection induced by interfacial traps becomes the mainstream working mechanism for obtaining PM phenomenon. A series of PM type OPDs was achieved by utilizing interfacial blocking layer and introducing trap states into active layer or interfacial layer. The filter‐free PM type narrowband OPDs are realized by combining the concept of charge injection narrowing with the mechanism of PM. Meanwhile, further development on this hot topic is proposed and fully discussed, including multifunctional OPDs, organic–inorganic hybrid photodetectors, and photodetector systems.

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Section: Fundamentals Of Photodetectorsmentioning

confidence: 99%

Section: Research Trends On Pm Type Opdsmentioning

confidence: 99%

Section: Research Trends On Pm Type Opdsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Progress on Photomultiplication Type Organic Photodetectors

Miao

Zhang

2018

Laser & Photonics Reviews

Self Cite

210

182

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show abstract

“…Recently, solution‐processed organic semiconductors, quantum dots, and organohalide perovskites (OHPs) have emerged as promising candidates for next generation photodetection, combining the merits of low fabrication costs, tailorable optoelectronic properties, and excellent performance . Photodetectors based on organohalide perovskites, in particular, have emerged over the last three years as a novel and highly promising technology, benefiting from the rapid progress in understanding of perovskite optoelectronics associated with their use in photovoltaic cells .…”

Section: Introductionmentioning

confidence: 99%

Near‐Infrared and Short‐Wavelength Infrared Photodiodes Based on Dye–Perovskite Composites

Lin

Wang

Young

et al. 2017

Adv Funct Materials

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Organohalide perovskites have emerged as promising light-sensing materials because of their superior optoelectronic properties and low-cost processing methods. Recently, perovskite-based photodetectors have successfully been demonstrated as both broadband and narrowband varieties. However, the photodetection bandwidth in perovskite-based photodetectors has so far been limited to the near-infrared regime owing to the relatively wide band gap of hybrid organohalide perovskites. In particular, short-wavelength infrared photodiodes operating beyond 1 µm have not yet been realized with organohalide perovskites. In this study, narrow band gap organic dyes are combined with hybrid perovskites to form composite films as active photoresponsive layers. Tuning the dye loading allows for optimization of the spectral response characteristics and excellent charge-carrier mobilities near 11 cm 2 V −1 s −1 , suggesting that these composites combine the light-absorbing properties or IR dyes with the outstanding charge-extraction characteristics of the perovskite. This study demonstrates the first perovskite photodiodes with deep near-infrared and short-wavelength infrared response that extends as far as 1.6 µm. All devices are solution-processed and exhibit relatively high responsivity, low dark current, and fast response at room temperature, making this approach highly attractive for next-generation light-detection techniques.

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“…Based on the non-fullerene material ITIC, an outstanding power conversion efficiencies (PCEs) higher than 11% was achieved by S. Li in the organic photovoltaic (OPV) [7]. Zhan and co-workers had reported organic photo detector (OPD) with a high detectivity (D*) of 10 12 Jones at ±15V, because the band bending decreases the tunneling-injection barriers of the oppositely charged carriers under light illumination [8]. However, the OPD based on photovoltaic effect using the PBDB-T : ITIC active layer has not been reported.…”

Section: Introductionmentioning

confidence: 99%