Liquid Crystallinity as a Self-Assembly Motif for High-Efficiency, Solution-Processed, Solid-State Singlet Fission Materials
(2019) In Advanced Energy Materials 9(31).- Abstract
Solution and solution-deposited thin films of the discotic liquid crystalline electron acceptor–donor–acceptor (A-D-A) p-type organic semiconductor FHBC(TDPP)2, synthesized by coupling thienyl substituted diketopyrrolopyrrole (TDPP) onto a fluorenyl substituted hexa-peri-hexabenzocoronene (FHBC) core, are examined by ultrafast and nanosecond transient absorption spectroscopy, and time-resolved photoluminescence studies to examine their ability to support singlet fission (SF). Grazing incidence wide-angle X-ray (GIWAX) studies indicate that as-cast thin films of FHBC(TDPP)2 are “amorphous,” while hexagonal packed discotic liquid crystalline films evolve during thermal annealing. SF in as-cast thin films is observed... (More)
Solution and solution-deposited thin films of the discotic liquid crystalline electron acceptor–donor–acceptor (A-D-A) p-type organic semiconductor FHBC(TDPP)2, synthesized by coupling thienyl substituted diketopyrrolopyrrole (TDPP) onto a fluorenyl substituted hexa-peri-hexabenzocoronene (FHBC) core, are examined by ultrafast and nanosecond transient absorption spectroscopy, and time-resolved photoluminescence studies to examine their ability to support singlet fission (SF). Grazing incidence wide-angle X-ray (GIWAX) studies indicate that as-cast thin films of FHBC(TDPP)2 are “amorphous,” while hexagonal packed discotic liquid crystalline films evolve during thermal annealing. SF in as-cast thin films is observed with an ≈150% triplet generation yield. Thermally annealing the thin films improves SF yields up to 170%. The as-cast thin films show no long-range order, indicating a new class of SF material where the requirement for local order and strong near neighbor coupling has been removed. Generation of long-lived triplets (µs) suggests that these materials may also be suitable for inclusion in organic solar cells to enhance performance.
(Less)
- author
- Masoomi-Godarzi, Saghar ; Liu, Maning LU ; Tachibana, Yasuhiro ; Mitchell, Valerie D. ; Goerigk, Lars ; Ghiggino, Kenneth P. ; Smith, Trevor A. and Jones, David J.
- publishing date
- 2019-08
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- liquid crystalline, organic photovoltaics, photophysics, self-assembly core, singlet fission
- in
- Advanced Energy Materials
- volume
- 9
- issue
- 31
- article number
- 1901069
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:85068679412
- ISSN
- 1614-6832
- DOI
- 10.1002/aenm.201901069
- language
- English
- LU publication?
- no
- id
- 66a15743-5b5c-4fab-a1b7-fb34a32fdc6f
- date added to LUP
- 2023-08-24 12:36:53
- date last changed
- 2023-08-28 09:14:22
@article{66a15743-5b5c-4fab-a1b7-fb34a32fdc6f, abstract = {{<p>Solution and solution-deposited thin films of the discotic liquid crystalline electron acceptor–donor–acceptor (A-D-A) p-type organic semiconductor FHBC(TDPP)<sub>2</sub>, synthesized by coupling thienyl substituted diketopyrrolopyrrole (TDPP) onto a fluorenyl substituted hexa-peri-hexabenzocoronene (FHBC) core, are examined by ultrafast and nanosecond transient absorption spectroscopy, and time-resolved photoluminescence studies to examine their ability to support singlet fission (SF). Grazing incidence wide-angle X-ray (GIWAX) studies indicate that as-cast thin films of FHBC(TDPP)<sub>2</sub> are “amorphous,” while hexagonal packed discotic liquid crystalline films evolve during thermal annealing. SF in as-cast thin films is observed with an ≈150% triplet generation yield. Thermally annealing the thin films improves SF yields up to 170%. The as-cast thin films show no long-range order, indicating a new class of SF material where the requirement for local order and strong near neighbor coupling has been removed. Generation of long-lived triplets (µs) suggests that these materials may also be suitable for inclusion in organic solar cells to enhance performance.</p>}}, author = {{Masoomi-Godarzi, Saghar and Liu, Maning and Tachibana, Yasuhiro and Mitchell, Valerie D. and Goerigk, Lars and Ghiggino, Kenneth P. and Smith, Trevor A. and Jones, David J.}}, issn = {{1614-6832}}, keywords = {{liquid crystalline; organic photovoltaics; photophysics; self-assembly core; singlet fission}}, language = {{eng}}, number = {{31}}, publisher = {{Wiley-Blackwell}}, series = {{Advanced Energy Materials}}, title = {{Liquid Crystallinity as a Self-Assembly Motif for High-Efficiency, Solution-Processed, Solid-State Singlet Fission Materials}}, url = {{http://dx.doi.org/10.1002/aenm.201901069}}, doi = {{10.1002/aenm.201901069}}, volume = {{9}}, year = {{2019}}, }