Organic photodetectors with high detectivity for broadband detection covering UV-vis-NIR

Xu, Congdi; Liu, Peng; Feng, Chuang; He, Zhicai; Cao, Yong

doi:10.1039/d2tc00525e

Cited by 28 publications

(25 citation statements)

References 66 publications

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“…As shown in Fig. S5 (ESI†), NIR-OPD based on BODIPY-F : PCBM (0.2 : 1, w/w) presents the highest R value (−5.0 V bias) of 130 mA W −1 at 675 nm, outperforming the reported values of NIR-OPDs 34–40 (see Table S3, ESI† for details).…”

Section: Resultsmentioning

confidence: 95%

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A near-infrared organic photodetector based on an aza-BODIPY dye for a laser microphone system

Chen

Wang

et al. 2023

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 95%

“…S7, ESI †). 42,43 Among the NIR-OPDs with different D : A ratio, the device based on BODIPY-F : PCBM (0.2 : 1, w/w) achieves the highest D* value in the NIR range under À1.0 V bias, reaching 6.85 Â 10 11 and 5.94 Â 10 11 Jones at a wavelength of 660 and 840 nm, respectively.…”

Section: Device Performancementioning

confidence: 99%

A near-infrared organic photodetector based on an aza-BODIPY dye for a laser microphone system

Chen

Wang

et al. 2023

J. Mater. Chem. C

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“…Figure S1 shows the EQE spectra of the OPDs operated under a −1 V bias. We used eq to calculate the responsivities ( R ) of the OPDs , R ( λ ) = normalE normalQ normalE ( λ ) × q λ h ν ( A W − 1 ) where q is the elementary charge, λ is the incident wavelength, and h ν is the incident photon energy (where h is the Planck constant and ν is the frequency). Figure d and Table display the calculated values of R .…”

Section: Results and Discussionmentioning

confidence: 99%

Highly Efficient Ternary Near-Infrared Organic Photodetectors for Biometric Monitoring

Jiang

Hsiao

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Near-infrared (NIR) small-molecule acceptors that absorb at wavelengths of up to 1000 nm are attractive for applications in organic photodetectors (OPDs) and biometrics. In this study, we incorporated IEICO-4F as the third component for PffBT4T-2OD:PC 71 BM-based OPDs to provide an efficient NIR response while greatly suppressing the leakage current at reverse bias. By varying the blend ratio and thickness (250−600 nm), we obtained an NIR OPD displaying an ultralow dark-current density (J D = 2.62 nA cm −2 ), ultrahigh detectivity [D* = 7.2 × 10 12 Jones (850 nm)], high sensitivity, and photoresponsivity covering the region from the ultraviolet to the NIR. We used tapping-mode atomic force microscopy, optical microscopy, grazing-incidence wide-angle X-ray scattering, and contact angle measurements to investigate the effect of IEICO-4F on the performance of the ternary OPDs. The low compatibility of PffBT4T-2OD and IEICO-4F, originating from weak intermolecular interactions, allowed us to manipulate the degree of phase separation between the donor and acceptor in the ternary blends, leading to an optimized blend morphology featuring efficient charge separation, transport, and collection. To demonstrate its applicability, we integrated our OPD with two light-emitting diodes and used the system for precisely calculated transmissive pulse oximetry.

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“…To improve the device performances of 2C60–2BT–POR SCOSCs, some optimizations were carried out. The J–V curve of the optimized device is shown in Figure , and the data are summarized in Tables , S2, and S3 . Among these optimized conditions, when the active layers were treated via SVA in an atmosphere of CS 2 for 40 s, the SCOSCs showed the best PCE of 1.51%, with a V OC of 1.05 V, a J SC of 4.22 mA cm –2 , and an FF of 34.25%.…”

Section: Resultsmentioning

confidence: 99%

“…The J−V curve of the optimized device is shown in Figure 4, and the data are summarized in Tables 1, S2, and S3. 38 Among these optimized conditions, when the active layers were treated via SVA in an atmosphere of CS 2 for 40 s, the SCOSCs showed the best PCE of 1.51%, with a V OC of 1.05 V, a J SC of 4.22 mA cm −2 , and an FF of 34.25%. Accordingly, the EQE curve of the SCOSC exceeds 20% in the visible region (Figure 4).…”

Section: Photovoltaic Propertiesmentioning

confidence: 99%

A–D–A-Type Porphyrins for Single-Component Organic Solar Cells

Jiang

Peng

2022

ACS Appl. Energy Mater.

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Two conjugated A–D–A (A = electron acceptor, D = electron donor) porphyrins 2OH–2BT–ZnPOR and 2C60–2BT–ZnPOR are designed and synthesized for single-component organic solar cells (SCOSCs). In the two molecules, two benzothiadiazoles (BTs) are connected to a porphyrin core as the electron-withdrawing units through π-bridges to build a conjugated A–D–A main chain, which can narrow the energy levels, broaden the absorption, and promote the intramolecular charge transfer of the porphyrins. While there are no other electron-acceptor side groups in 2OH–2BT–ZnPOR, two fullerene units are symmetrically connected to 2OH–2BT–ZnPOR in 2C60–2BT–ZnPOR. Though the 2OH–2BT–ZnPOR-based SCOSCs exhibit a very poor device performances, the 2C60–2BT–ZnPOR-based SCOSC shows a power conversion efficiency (PCE) of 1.51% and a high open-circuit voltage (V OC) of 1.05 V, which is also much higher than those of previously reported porphyrin-based SCOSCs. The much higher performance of 2C60–2BT–ZnPOR SCOSCs can be ascribed to the delocalized π-electrons induced by the conjugated A–D–A main chain and the promoted charge dissociation induced by the fullerene units in 2C60–2BT–ZnPOR.

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Organic photodetectors with high detectivity for broadband detection covering UV-vis-NIR

Abstract: OPDs with ultra-low dark current density and high detectivity are developed via interfacial and morphological modifications in the ternary device. A highest D* at 1060 nm exceeding 8.2 × 1012 Jones is achieved with fast response and wide LDR.

Cited by 28 publications

References 66 publications

A near-infrared organic photodetector based on an aza-BODIPY dye for a laser microphone system

A near-infrared organic photodetector based on an aza-BODIPY dye for a laser microphone system

Highly Efficient Ternary Near-Infrared Organic Photodetectors for Biometric Monitoring

A–D–A-Type Porphyrins for Single-Component Organic Solar Cells

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