Title:
PHOTODETECTOR ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/200315
Kind Code:
A1
Abstract:
[Problem] To reduce the dark current ratio of a photodetector element. [Solution] A photodetector element 10 comprising an anode 12, a cathode 16, and an active layer 14 that is provided between the anode and the cathode and contains a p-type semiconductor material and an n-type semiconductor material, wherein the value obtained by subtracting the absolute value of the HOMO energy level of the p-type semiconductor material from the absolute value of the HOMO energy level of the n-type semiconductor material is at most 0.35. Moreover, the difference between the HOMO of the n-type semiconductor material and the HOMO of the p-type semiconductor material is preferably 0-0.10 eV, and the p-type semiconductor material is preferably a polymer compound containing a structural unit represented by formula (I). (In formula (I), Ar1 and Ar2 represent an optionally substituted trivalent aromatic heterocyclic group or an optionally substituted trivalent aromatic carbon ring group, and Z represents a group represented by formula (Z-1) to formula (Z-7).)
Inventors:
FERRARA GIOVANNI (JP)
ARAKI TAKAFUMI (JP)
OZEKI MIHO (JP)
ARAKI TAKAFUMI (JP)
OZEKI MIHO (JP)
Application Number:
PCT/JP2021/011595
Publication Date:
October 07, 2021
Filing Date:
March 22, 2021
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
H01L51/42; H01L27/30; H01L31/10
Domestic Patent References:
| WO2017126401A1 | 2017-07-27 | |||
| WO2019193331A2 | 2019-10-10 | |||
| WO2014031364A2 | 2014-02-27 | |||
| WO2011052709A1 | 2011-05-05 | |||
| WO2013051676A1 | 2013-04-11 |
Foreign References:
| JP2015220331A | 2015-12-07 | |||
| US20170057962A1 | 2017-03-02 |
Other References:
APPL. PHYS. LETT., vol. 110, 2017, pages 083301
RSC ADV., vol. 7, 2017, pages 1743 - 1748
ADV. MATER., vol. 15, no. 12, 2003
See also references of EP 4131440A4
RSC ADV., vol. 7, 2017, pages 1743 - 1748
ADV. MATER., vol. 15, no. 12, 2003
See also references of EP 4131440A4
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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