Optimization of Broad-Response and High-Detectivity Polymer Photodetectors by Bandgap Engineering of Weak Donor–Strong Acceptor Polymers

Qi, Ji; Han, Jinfeng; Zhou, X. K.; Yang, Dezhi; Zhang, Jidong; Qiao, Wenxiao; Ma, Dongge; Wang, Zhi Yuan

doi:10.1021/acs.macromol.5b00859

Cited by 83 publications

(40 citation statements)

References 69 publications

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“…As indicated above, inferring the D * based upon a simplifi ed version of Equation ( 3) (i.e., only taking shot and/or thermal noise into account) rather than its experimental evaluation from the measured noise is misleading and can result in an overestimation of the detectivity. The use of the measured noise, which is more appropriate and accurate, [ 40,95,120,142 ] is not universally adopted, and this makes it diffi cult to compare OPDs reported by different groups. Figure 4 shows two examples of noise and detectivity, as evaluated for OPDs.…”

Section: Noise Equivalent Power (Nep) and Specifi C Detectivity (D*)mentioning

confidence: 99%

Organic Photodiodes: The Future of Full Color Detection and Image Sensing

et al. 2016

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Major growth in the image sensor market is largely as a result of the expansion of digital imaging into cameras, whether stand-alone or integrated within smart cellular phones or automotive vehicles. Applications in biomedicine, education, environmental monitoring, optical communications, pharmaceutics and machine vision are also driving the development of imaging technologies. Organic photodiodes (OPDs) are now being investigated for existing imaging technologies, as their properties make them interesting candidates for these applications. OPDs offer cheaper processing methods, devices that are light, flexible and compatible with large (or small) areas, and the ability to tune the photophysical and optoelectronic properties - both at a material and device level. Although the concept of OPDs has been around for some time, it is only relatively recently that significant progress has been made, with their performance now reaching the point that they are beginning to rival their inorganic counterparts in a number of performance criteria including the linear dynamic range, detectivity, and color selectivity. This review covers the progress made in the OPD field, describing their development as well as the challenges and opportunities.

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Section: Noise Equivalent Power (Nep) and Specifi C Detectivity (D*)mentioning

confidence: 99%

Organic Photodiodes: The Future of Full Color Detection and Image Sensing

et al. 2016

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“…Besides the bandgap requirement, suitable film morphology and adequate molecular stacking are required to warrant good performance of all‐polymer photovoltaic devices . Interpenetrating networks of domains with a spacing comparable to the exciton diffusion length (10–20 nm) are deemed highly desirable in order to ensure efficient exciton separation, charge carrier transport, and collection . As the self‐organization behavior and interchain interaction of the polymer–polymer blends are rather different from the PCBM‐doped polymers, the processing conditions (e.g., solvents, annealing, and additives) are critical and should be optimized in order to achieve the ideal morphology and preferred molecular ordering of the active layer of all‐polymer BHJ photovoltaic devices …”

Section: Introductionmentioning

confidence: 99%

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Qiao

Zhou

et al. 2016

Macro Chemistry & Physics

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Broad‐response and high‐detectivity for all‐polymer photodetectors based on p‐ and n‐type semiconducting polymers have been achieved through optimization of polymer property and film microstructure. The electron‐donating units in the p‐type polymers affect a great deal of the polymer properties such as solubility, absorption spectra, and electronic energy levels, which in turn can influence the device performance. The polymer (P3) based on dithienopyrrole and diketopyrrolopyrrole is most promising for photodetector applications, as it possesses the suitable energy level with regard to the n‐type polymer and exhibits appropriate film morphology and molecular stacking with aid of 1,8‐diiodooctane as an additive during film processing. The photodetector based on P3/poly{[N,N′‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)} (PNDI) exhibits good response from 300 to 1100 nm and nearly constant detectivity (D*) above 1012 Jones at 330–980 nm, rendering a great potential of all‐polymer photodetectors for practical applications.

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“…In addition, by optimization of the film morphology and molecular orientation through addition of 1,8‐diiodooctane (DIO) additive, broad response and high detectivity of polymer photodetectors were realized. The photodetector based on polymer 44 exhibits specific detectivity of greater than 10 11 Jones in a broad spectral region of 300 − 1200 nm, demonstrating the great potential of polymer photodetectors for UV‐Vis‐NIR panchromatic detection 51…”

Section: Near‐infrared Polymersmentioning

confidence: 99%

“…Copolymerization is a useful approach to the adjustment of the absorption spectra, energy levels, and properties of D‐A polymers 49, 50. Recently, we reported a series of low‐bandgap copolymers consisting of one donor and two acceptors (Scheme ) 51. By adjusting the ratio of the two acceptors with different electron‐withdrawing strengths (DPP and TIIG), the polymer properties and optoelectronic device performance also changed.…”

Section: Near‐infrared Polymersmentioning

confidence: 99%

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Advances in Organic Near-Infrared Materials and Emerging Applications

Qiao

Wang

2016

The Chemical Record

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108

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Much progress has been made in the field of research on organic near-infrared materials for potential applications in photonics, communications, energy, and biophotonics. This account mainly describes our research work on organic near-infrared materials; in particular, donor-acceptor small molecules, organometallics, and donor-acceptor polymers with the bandgaps less than 1.2 eV. The molecular designs, structure-property relationships, unique near-infrared absorption, emission and color/wavelength-changing properties, and some emerging applications are discussed.

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Optimization of Broad-Response and High-Detectivity Polymer Photodetectors by Bandgap Engineering of Weak Donor–Strong Acceptor Polymers

Cited by 83 publications

References 69 publications

Organic Photodiodes: The Future of Full Color Detection and Image Sensing

Organic Photodiodes: The Future of Full Color Detection and Image Sensing

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Advances in Organic Near-Infrared Materials and Emerging Applications

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