Fully Inkjet‐Printed Organic Photodetectors with High Quantum Yield

Azzellino, Giovanni; Grimoldi, Andrea; Binda, Maddalena; Caironi, Mario; Natali, Dario; Sampietro, Marco

doi:10.1002/adma.201303473

Cited by 141 publications

(129 citation statements)

References 48 publications

(40 reference statements)

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“…A lower electric field leads to a lower average carrier velocity, hence, at the same time both the velocity is lower and the travel distance is higher: it follows that with an increasing thickness of the layers, the carrier average travel time is increased, with a consequent reduction of the highest 27 ≈ 100 32 (−1 V bias) 10 −3 Inkjet Azzellino et al 28 ≈ 10000 65 (−0,9V bias) 10 −3 Inkjet Baierl et al 19 ≈ 100000 70 (−4V bias) 10 −5 Spray/inverted Falco et al 29 ≈ 100000 65 (−5V bias) 10 −4 Spray/CNT This work ≈ 100000 59 (−4V bias) 10 −4 Spray possible operating frequencies. As mentioned above photodiodes optimized in order to achieve a high on-off ratio are limited in their dynamic response, which reduces their field of application to stationary ones.…”

Section: Cut-off Frequencymentioning

confidence: 95%

Spray coated indium-tin-oxide-free organic photodiodes with PEDOT:PSS anodes

et al. 2014

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In this paper we report on Indium Tin Oxide (ITO)-free spray coated organic photodiodes with an active layer consisting of a poly(3-hexylthiophen) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend and patterned poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) electrodes. External quantum efficiency and current voltage characteristics under illuminated and dark conditions as well as cut-off frequencies for devices with varying active and hole conducting layer thicknesses were measured in order to characterize the fabricated devices. 60% quantum efficiency as well as nearly four orders of magnitude on-off ratios have been achieved. Those values are comparable with standard ITO devices.

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Section: Cut-off Frequencymentioning

confidence: 95%

Spray coated indium-tin-oxide-free organic photodiodes with PEDOT:PSS anodes

et al. 2014

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“…While many molecular materials are processed by evaporation, [ 105 ] there are examples whereby they are solution processed. [ 37,106 ] Macromolecules such as dendrimers and polymers can be processed from solution using techniques such as aerosol-jet printing, [ 107 ] spin-coating, [ 108 ] inkjet-printing, [ 109,110 ] screen printing, [ 111 ] or spray-coating. [112][113][114][115] …”

Section: Organic Photodiodes (Opds)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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“…Printable photodetectors, including phototransistors and photodiodes, have potential for the creation of low-cost but high-performance image sensors on flexible substrates [4][5][6][7][8][9][10][11][12] , and could open new methods of imaging not possible with rigid substrates 13,14 . Phototransistors produce photoconductive gain, which is not seen in photodiodes, and results in external quantum efficiencies (EQEs) well over 100% (refs 15-20).…”

Section: Pierre * Abhinav Gaikwad and Ana Claudia Ariasmentioning

confidence: 99%