Efficiency and spectral performance of narrowband organic and perovskite photodetectors: a cross-sectional review

Pecunia, Vincenzo

doi:10.1088/2515-7639/ab336a

Cited by 64 publications

(78 citation statements)

References 137 publications

(420 reference statements)

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“…In fact, we also faced a general lack of small‐molecule candidates, as also confirmed by the paucity of the literature on far‐red‐selective NBA photodetectors (cf. the large number of small‐molecule donors reported for NBA photodetection in the green and the blue ranges), as we found in our recent surveys of the area 11,15. We found, however, that 2,4‐Bis[4‐( N , N ‐diisobutylamino)‐2,6‐dihydroxyphenyl] (DIBSQ, see Figure 2b), a squaraine molecule, could allow us to approximate the narrowband dual‐absorber D–A configuration.…”

Section: Resultssupporting

confidence: 55%

“…In view of the limited current choice of far‐red‐absorbing donors (e.g., see Table S1 in the Supporting Information and refs. 11,15), it can be anticipated that future synthetic efforts on the development of suitable donors may be able to improve the spectral performance of the narrowband dual‐absorber D–A approach in the far‐red range.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, organic photodetectors with narrowband (or spectrally selective) functionality have attracted ever‐growing attention due to their potential beyond the confines of conventional photodetector technologies 9–11. On the basis of their spectral tunability via chemical tailoring,12 their facile low‐temperature processing,13 and their mechanical flexibility,14 organic semiconductors bear the promise of delivering narrowband photodetection with high performance and in unconventional settings and form factors,15 e.g., in low‐cost, point‐of‐use devices for wearable optoelectronics,16,17 the Internet of Things,18 computer vision,19 and biomedicine 20…”

Section: Introductionmentioning

confidence: 99%

“…Among the several organic narrowband photodetection strategies that have been investigated to date, the so‐called narrowband absorption (NBA) strategy—relying on a photoactive layer predominantly absorbing in the target spectral range—has been prominent 11,15. Alternative narrowband strategies relying on internal optoelectronic filtering effects (such as charge carrier narrowing21 and charge‐injection narrowing5,22) or on microcavity resonance23 have also been explored, delivering remarkable performance for applications requiring a particularly narrow spectral response.…”

Section: Introductionmentioning

confidence: 99%

“…As confirmed by the paucity of the far‐red NBA literature27,39–43 (see also Table S1 in the Supporting Information and our recent surveys of the field11,15), it has been challenging so far to replicate in the far‐red range the success that the NBA strategy has achieved in the mainstream color bands. Indeed, the spectral width of far‐red NBA photodetectors to date is typically approaching 200 nm or larger,39–43 and in one instance the spectral rejection ratio is lower than 2,39 i.e., the full width at half maximum is ill‐defined (the spectral rejection ratio is intended as the ratio between the peak responsivity in the target spectral range and the responsivity outside the target spectral range15). This directly relates to the synthetic challenge of developing organic semiconductors that can selectively absorb in this spectral region without presenting additional absorption bands at shorter wavelengths in the visible range (which would worsen/compromise spectral rejection in the stopband) 27,39,44–46.…”

Section: Introductionmentioning

confidence: 99%

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Narrowband‐Absorption‐Type Organic Photodetectors for the Far‐Red Range Based on Fullerene‐Free Bulk Heterojunctions

Xia

Wang

et al. 2020

Advanced Optical Materials

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chemical tailoring, [12] their facile lowtemperature processing, [13] and their mechanical flexibility, [14] organic semiconductors bear the promise of delivering narrowband photodetection with high performance and in unconventional settings and form factors, [15] e.g., in low-cost, point-of-use devices for wearable optoelectronics, [16,17] the Internet of Things, [18] computer vision, [19] and biomedicine. [20] Among the several organic narrowband photodetection strategies that have been investigated to date, the so-called narrowband absorption (NBA) strategy-relying on a photoactive layer predominantly absorbing in the target spectral range-has been prominent. [11,15] Alternative narrowband strategies relying on internal optoelectronic filtering effects (such as charge carrier narrowing [21] and charge-injection narrowing [5,22] ) or on microcavity resonance [23] have also been explored, delivering remarkable performance for applications requiring a particularly narrow spectral response. With respect to the NBA strategy, it builds on the inherent spectral tunability and narrowband absorption of many organic semiconductors. [24][25][26][27][28] In particular, NBA photo detectors are inherently nonfiltered, i.e., they have little/negligible impact on the spectral content of the incident light outside the target spectral range. Consequently, NBA photodetectors can potentially deliver multicolor/multispectral detection in a stacked configuration, [29][30][31] a route that is particularly attractive for high-resolution imaging beyond the capabilities of benchmark technologies. In fact, NBA photodetectors have been particularly successful in delivering narrowband functionality in the blue, green, and red spectral regions, attaining spectral responsivity passbands with typical spectral widths of ≈100-150 nm, and specific detectivity values up to the 10 13 Jones range. [11] Developing and emerging applications (e.g., requiring multispectral capability) motivate the effort to expand the scope of organic NBA narrowband photodetectors beyond the boundaries of conventional color detection. In particular, narrowband photodetection in the far-red range (i.e., photodetectors with peak response at 700-750 nm)-dimly visible to the human eye and at the same time distinct from the infrared regionis of considerable interest, in view of its role in many natural Spectrally-selective photodetection via organic semiconductors manifesting narrowband absorption (NBA photodetection) is highly attractive for emerging applications that require ultrathin, lightweight, and low-cost solutions. While successful over mainstream color bands, NBA photodetectors have struggled so far to meet the functional and/or performance demands at longer wavelengths, importantly in the far-red (700-750 nm), a range relevant to diverse applications in analytical biology, medical diagnostics, remote sensing, etc. In consideration of the potential of a nonfullerene-acceptor route to address this challenge, the narrowband photodetection capabilities of SBDTIC, ...

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Narrowband‐Absorption‐Type Organic Photodetectors for the Far‐Red Range Based on Fullerene‐Free Bulk Heterojunctions

Xia

Wang

et al. 2020

Advanced Optical Materials

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Unconventional Image‐Sensing and Light‐Emitting Devices for Extended Reality

Park

Seung

Kim

et al. 2021

Adv Funct Materials

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Extended reality (XR) refers to a space where physical and digital elements coexist and comprises three elements, namely, environment, human, and computer, which interact with each other. Image sensors and displays are the core elements of XR systems because visual information is important for recognizing and judging objects. Recently, new features of image sensors and displays that are useful for developing next‐generation XR systems have been reported. For example, a miniaturized version of image sensors with the superb object detection and recognition capability offers new opportunities for machine vision technology. Furthermore, transparent and deformable displays are the key components of XR systems because they not only provide highly realistic virtual image information but also serve as efficient user interfaces. Herein, the recent progresses in such unconventional image sensors and display technologies are reviewed. First, image sensors with features of wavelength‐selective photodetection for color discrimination, neuromorphic image acquisition for facile pattern recognition, and curved image sensor designs inspired by biological eyes for miniaturization and unconventional imaging performances are discussed. Then, light‐emitting device technologies focusing on devices with transparency and deformable form factors are described. Finally, the review is concluded with a brief summary and a future outlook.

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Wavelength‐Selective Organic Photodetectors

Vanderspikken

Maes

Vandewal

2021

Adv Funct Materials

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Spectroscopic sensing combined with optical imaging is crucial with respect to today's ever‐growing demand for instant analytical techniques to be incorporated in various handheld and wearable devices. Further miniaturization and integration of such types of sensors is critical and wavelength‐selective organic photodetectors (OPDs) may provide the required technology. In this progress report, some early OPD applications and their potential are presented. Crucial device parameters such as the specific detectivity, external quantum efficiency, and dark current density of visible and near‐infrared wavelength‐selective photodetectors are compared and assayed to theoretical and semi‐empirical limits. The different organic detector approaches include the use of inherently narrow‐band absorbers as well as internally filtered and microcavity devices. Each of these strategies comes with its own specific material and device design criteria, around which material development and selection should be centered to move beyond the current state of the art. As OPD technology matures, device stability becomes important and is hence also briefly discussed. Via this perspective, it is aimed to provide the reader with critical insights into the device physics and chemistry of wavelength‐selective OPDs, hereby providing leverage for new ideas to bring this technology to the market.

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Efficiency and spectral performance of narrowband organic and perovskite photodetectors: a cross-sectional review

Cited by 64 publications

References 137 publications

Narrowband‐Absorption‐Type Organic Photodetectors for the Far‐Red Range Based on Fullerene‐Free Bulk Heterojunctions

Narrowband‐Absorption‐Type Organic Photodetectors for the Far‐Red Range Based on Fullerene‐Free Bulk Heterojunctions

Unconventional Image‐Sensing and Light‐Emitting Devices for Extended Reality

Wavelength‐Selective Organic Photodetectors

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