Contribution of dark current density to the photodetecting properties of thieno[3,4-b]pyrazine-based low bandgap polymers
DC Field | Value | Language |
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dc.contributor.author | Kim, Hyeokjun | - |
dc.contributor.author | Kang, Jinhyeon | - |
dc.contributor.author | Ahn, Hyungju | - |
dc.contributor.author | Jung, In Hwan | - |
dc.date.accessioned | 2022-07-06T10:46:49Z | - |
dc.date.available | 2022-07-06T10:46:49Z | - |
dc.date.created | 2021-12-08 | - |
dc.date.issued | 2022-01 | - |
dc.identifier.issn | 0143-7208 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/139908 | - |
dc.description.abstract | Recently, near infrared (NIR) organic photodetectors (OPDs) have been extensively studied. Bulk heterojunction NIR OPDs composed of a high-bandgap polymer donor (PD) and a low-bandgap non-fullerene acceptor (NFA) showed the best performance, whereas the low-bandgap PD-based OPDs were relatively unsuccessful due to the high level of dark current density (Jd) under a negative bias. In this study, we synthesized three low-bandgap PDs based on a thieno[3,4-b]pyrazine (TP) moiety and developed red-NIR OPDs by blending them with a low-bandgap NFA. We found that the PD having a shallow HOMO energy level generated the largest ground-state electron transfer at negative bias, which overestimated the responsivity (R) and detectivity (D*) in OPDs. Notably, under weak light irradiation of 0.1 mW/cm2 at -2V, the contribution of Jd on Jph reached 99.6%. Thus, we modified the existing R and D* equations to better understand photodetecting properties at low light intensity, and these modified equations gave more realistic R and D* values in OPDs. On the other hand, a low-bandgap PD showing low Jd in OPDs was highly beneficial to detect a low light signal because the Jd negligibly contributed to Jph in OPDs. The low Jd values of OPDs at negative bias resulted in a high on/off signal ratio and constant R and D* values at different light intensities. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.title | Contribution of dark current density to the photodetecting properties of thieno[3,4-b]pyrazine-based low bandgap polymers | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Jung, In Hwan | - |
dc.identifier.doi | 10.1016/j.dyepig.2021.109910 | - |
dc.identifier.scopusid | 2-s2.0-85118253438 | - |
dc.identifier.wosid | 000719411300004 | - |
dc.identifier.bibliographicCitation | DYES AND PIGMENTS, v.197, pp.1 - 10 | - |
dc.relation.isPartOf | DYES AND PIGMENTS | - |
dc.citation.title | DYES AND PIGMENTS | - |
dc.citation.volume | 197 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 10 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Applied | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Textiles | - |
dc.subject.keywordPlus | PEROVSKITE SOLAR-CELLS | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | COPOLYMERS | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordAuthor | Red-NIR photodetectors | - |
dc.subject.keywordAuthor | Organic photodiodes | - |
dc.subject.keywordAuthor | Detectivity | - |
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