High-Performance Organic Photodetectors from a High-Bandgap Indacenodithiophene-Based π-Conjugated Donor-Acceptor Polymer

被引：53

作者：

Benavides, Cindy Montenegro ^{[1
,2
]}

Murto, Petri ^{[3
,4
]}

Chochos, Christos L. ^{[5
,6
]}

Gregoriou, Vasilis G. ^{[5
]}

Avgeropoulos, Apostolos ^{[6
]}

Xu, Xiaofeng ^{[3
]}

Bini, Kim ^{[3
]}

Sharma, Anirudh ^{[4
,7
]}

Andersson, Mats R. ^{[4
]}

Schmidt, Oliver ^{[1
]}

Brabec, Christoph J. ^{[2
]}

Wang, Ergang ^{[3
]}

Tedde, Sandro F. ^{[1
]}

机构：

[1] Siemens Healthcare GmbH, Gunther Scharowsky St 1, D-91058 Erlangen, Germany

[2] Friedrich Alexander Univ Erlangen Nurnberg, Dept Mat Sci, I MEET, Martensstr 7, D-91058 Erlangen, Germany

[3] Chalmers Univ Technol, Dept Chem & Chem Engn Appl Chem, SE-41296 Gothenburg, Sweden

[4] Flinders Univ S Australia, Flinders Ctr Nanoscale Sci & Technol, Shirt Rd, Adelaide, SA 5042, Australia

[5] Advent Technol SA, Patras Sci Pk,Stadiou St, Platani Rio 26504, Patra, Greece

[6] Univ Ioannina, Dept Mat Sci Engn, GR-45110 Ioannina, Greece

[7] Univ Bordeaux, LCPO, UMR 5629, B8 Allee Geoffroy St Hilaire, F-33615 Pessac, France

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 15期

基金：

瑞典研究理事会;

关键词：

concentration ratio; dark current density; frequency response; high speed; molecular weight; red organic photodetectors; HETEROJUNCTION SOLAR-CELLS; MOLECULAR-WEIGHT; PHOTOVOLTAIC PERFORMANCE; SEMICONDUCTING POLYMERS; SPECTRAL RESPONSE; PHOTODIODES; POLY(3-HEXYLTHIOPHENE); MORPHOLOGY; GAP; PHOTORESPONSE;

D O I：

10.1021/acsami.8b03824

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A conjugated donor-acceptor polymer, poly[4,4,9,9-tetrakis (4-hexylpheny1)-4,9-dihydro-s-in dace no [1,2-b: 5,6-b']dithiophene 2,7 diyl alt-5 (2-ethylhexyl)-4H-thieno[3,4-c] pyrrole-4,6 (5H)-dione-1,3-diyl](PIDT-TPD), is blended with the fullerene derivative [6,6]phenyl-C61-butyric acid methyl ester (PC61BM) for the fabrication of thin and solution-processed organic photodetectors (OPDs). Systematic screening of the concentration ratio of the blend and the molecular weight of the polymer is performed to optimize the active layer morphology and the OPD performance. The device comprising a medium molecular weight polymer (27.0 kg/mol) in a PIDT-TPD:PC61BM 1:1 ratio exhibits an external quantum efficiency of 52% at 610 nm, a dark current density of 1 nA/cm(2), a detectivity of 1.44 x 10(13) Jones, and a maximum 3 dB cutoff frequency of 100 kHz at -5 V bias. These results are remarkable among the state-of-the-art red photodetectors based on conjugated polymers. As such, this work presents a functional organic active material for high-speed OPDs with a linear photoresponse at different light intensities.

引用

页码：12937 / 12946

页数：10

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