High response organic ultraviolet photodetector based on bis (2-methyl-8-quinolinato)-4-phenylphenolate aluminum

Cui, Yun-Cheng; Liu, Lihui; Liu, Chunbo; Wang, Qingwei; Li, Wenlian; Che, Guangbo; Xu, Chunhui; Liu, Mei

doi:10.1016/j.synthmet.2009.11.007

Cited by 17 publications

(6 citation statements)

References 17 publications

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“…The device anyway showed a limited responsivity R of ∼30 mA/W at 360 nm (EQE ≈ 10%). This is because the IP and EA of Alq 3 , being 5.5 eV and 2.4 eV respectively132 are not well matched with TPD levels 136. Better performances can be obtained by using tris(8‐hydroxyquinoline) gallium (Gaq 3 ), a complex with energy levels very similar to Alq 3 , but suppressing radiative decay in combination with m‐MTDATA 132.…”

Section: Photodiodesmentioning

confidence: 99%

“…A 1:1 blend of m‐MTDATA and tris‐(8‐hydroxyquinoline) gadolinium (Gdq) yielded a detector with a 365 nm responsivity of 230 mA/W at 7.5 V (EQE ≈ 78%), with very suppressed photocurrent above 400 nm. Other successfully adopted acceptors are: bis(2‐methyl‐8‐quinolinato)‐4‐phenylphenolate aluminum (BAlq), a common electron transporting layer in OLEDs, characterized by a high electron mobility and a good level matching with m‐MTDATA,126, 136 1,3,5‐tris(N‐phenyl‐benzimidazol‐2‐yl) benzene (TPBi), a high electron mobility material with a peak absorbance around 315 nm,129, 130 1,3,4‐oxadiazole‐containing oligoaryls, also covalently linked to tryarildiamine compounds,121 and 2‐(4‐tertbutylphenyl)‐5‐(4‐biphenylyl)‐1,3,4‐oxadiazole (PBD) 123. Wide E G acceptors, such as 4,7‐diphenyl‐1,10‐phenanthroline‐(bathophenanthroline) (Bphen)124 or a silane‐containing triazine derivative (NSN),125 allowed to develop DUV detectors in combination with a proper donor and with the filters mentioned before.…”

Section: Photodiodesmentioning

confidence: 99%

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Organic Light Detectors: Photodiodes and Phototransistors

et al. 2013

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While organic electronics is mostly dominated by light-emitting diodes, photovoltaic cells and transistors, optoelectronics properties peculiar to organic semiconductors make them interesting candidates for the development of innovative and disruptive applications also in the field of light signal detection. In fact, organic-based photoactive media combine effective light absorption in the region of the spectrum from ultraviolet to near-infrared with good photogeneration yield and low-temperature processability over large areas and on virtually every substrate, which might enable innovative optoelectronic systems to be targeted for instance in the field of imaging, optical communications or biomedical sensing. In this review, after a brief resume of photogeneration basics and of devices operation mechanisms, we offer a broad overview of recent progress in the field, focusing on photodiodes and phototransistors. As to the former device category, very interesting values for figures of merit such as photoconversion efficiency, speed and minimum detectable signal level have been attained, and even though the simultaneous optimization of all these relevant parameters is demonstrated in a limited number of papers, real applications are within reach for this technology, as it is testified by the increasing number of realizations going beyond the single-device level and tackling more complex optoelectronic systems. As to phototransistors, a more recent subject of study in the framework of organic electronics, despite a broad distribution in the reported performances, best photoresponsivities outperform amorphous silicon-based devices. This suggests that organic phototransistors have a large potential to be used in a variety of optoelectronic peculiar applications, such as a photo-sensor, opto-isolator, image sensor, optically controlled phase shifter, and opto-electronic switch and memory.

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Section: Photodiodesmentioning

confidence: 99%

Section: Photodiodesmentioning

confidence: 99%

Organic Light Detectors: Photodiodes and Phototransistors

et al. 2013

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“…The onset oxidation potential of BHBT 2 pentamer started as low as 0.22 V. Thus, the calculated HOMO and LUMO energies from the voltammogram of BHBT 2 pentamer are correspondingly at ca. [27][28][29][30][31] Additionally, one can notices from this band diagram that the energy difference between LUMO offset of the donor and acceptor is large. Fig.…”

Section: Optical Thermal and Electrochemical Properties Of Bhbt 2 Pementioning

confidence: 83%

Synthesis and characterization of 2,2′-bithiophene end-capped dihexyloxy phenylene pentamer and its application in a solution-processed organic ultraviolet photodetector

et al. 2016

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In this work a new solution processable small organic material, namely 2,2'-Bithiophene end-capped dihexyloxy phenylene pentamer (BHBT2) was synthesized, characterized and applied in the fabrication of organic ultraviolet photodetector. The material was synthesized via Williamson etherification, bromination and Suzuki coupling. FTIR and NMR spectroscopies were recorded for the BHBT2 along with its optical, thermal and electrochemical properties. Finally, the BHBT2 was used as donor material to produce a solution-processed UV photodetector based on BHBT2:PC61BM organic active layer. Results showed that in the forward biasing, the photodetector exhibited photovoltaic effect with Jsc = 1.80 mA, Voc = 0.66 V, FF = 0.30 and PCE = 0.98 %, while in the reverse biasing, the photodetector exhibited fast, reversible and stable response with the highest detectivity of 1.47×10 9 Jones. The realization of efficient UV detection was attributed to the strong absorption of BHBT2 and PC61BM in the UV region. Hence, BHBT2 pentamer coupled with PC61BM can be considered as potential materials to be applied in the solution-processed organic UV photodetector.

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“…This value is the best reported for organic UV−PDs [19]. These accomplishments in organic UV−PDs mentioned above centred around fluorescent materials [14][15][16]19] and little attention has been paid to phosphorescent mate− rials [20,21]. In this paper, we utilized m−MTDATA as electron donor, two phosphorescent Cu(I) complexes, CuDP and CuBP as electron acceptors to fabricate highly sensitive UV−PDs.…”

Section: Introductionmentioning

confidence: 97%

Highly efficient organic ultraviolet photodetectors based on excellent Cu (I) complexes

Liu

et al. 2013

Opto-Electronics Review

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We demonstrate high response organic ultraviolet photodetectors using 4,4′,4″-tris[3-methyl-pheny(phenyl)amino]tri-phenylamine (m-MTDATA) and two novel Cu(I) complexes, [Cu(DPEphos)(PyPhen)]BF4 (CuDP)(DPEphos = Bis [2-(diphenylphosphino)phenyl]ether, PyPhen = pyrazino[2,3-f][1,10]phenanthroline) and [Cu(DPEbenz)(PyPhen)]BF4 (CuBP) (DPEbenz = 1,2-bis(diphenylphosphino)benzene) to act as the electron donor and acceptor, respectively. Strong photoluminescence quenching of m-MTDATA by Cu(I) complexes is observed manifesting the efficient photoinduced charge transfer that occurs between m-MTDATA and Cu(I) complexes. The optimized photodetector based on CuBP exhibits a maximum response of 276 mA/W at −12 V under an illumination of 365 nm UV light irradiation with an intensity of 1.75 mW/cm2. The high response is attributed to feasible energy level match, efficient electron transfer from m-MTDATA to CuBP and skillful device design. More detailed working mechanism of harvesting high performance is also discussed.

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High response organic ultraviolet photodetector based on bis (2-methyl-8-quinolinato)-4-phenylphenolate aluminum

Cited by 17 publications

References 17 publications

Organic Light Detectors: Photodiodes and Phototransistors

Organic Light Detectors: Photodiodes and Phototransistors

Synthesis and characterization of 2,2′-bithiophene end-capped dihexyloxy phenylene pentamer and its application in a solution-processed organic ultraviolet photodetector

Highly efficient organic ultraviolet photodetectors based on excellent Cu (I) complexes

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