Wavelength-selective porphyrin photodiodes via control of Soret- and Q-band absorption
- Authors
- Bernardini, Martina Shasa; Kim, Juhee; Kim, Hyeokjun; Song, Minkyu; Jang, Woo-Dong; Chung, Dae Sung; Jung, In Hwan
- Issue Date
- Sep-2021
- Publisher
- Elsevier Ltd
- Keywords
- Porphyrins; Photodetectors; Wavelength selectivity; Photodiodes; Detectivity
- Citation
- Dyes and Pigments, v.193, pp 1 - 7
- Pages
- 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- Dyes and Pigments
- Volume
- 193
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/941
- DOI
- 10.1016/j.dyepig.2021.109531
- ISSN
- 0143-7208
1873-3743
- Abstract
- Porphyrin-based photodiode materials have mainly been targeted to achieve panchromatic absorption by maximizing the Soret- and Q-band absorption; however, they have rarely been studied with the purpose to make them wavelength-selective in photodetecting devices. In this study, we synthesized a wavelength-selective porphyrin material, PZn-FL, via Sonogashira coupling between an ethyne π-linked porphyrin core (PZn) and four fluorene (FL) moieties. The synthesized PZn-FL material showed a narrow full-width-at-half-maximum (FWHM) of 75 nm in the blue absorption region. The Q-band absorption of PZn-FL was significantly suppressed in organic photodiodes (OPDs), resulting in a blue-selective specific detectivity spectrum with a FWHM of 75 nm and a noise equivalent power of 2.86 × 10−12 W/Hz0.5. The planar backbone structure of PZn-FL was beneficial to increase charge transport and reduce bimolecular recombination, and the vertically oriented alkyl side chains of the PZn backbone contributed to prevent severe intermolecular aggregation and maintain a narrow absorption in film state.
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