| TABACHNYK, M., A.H. KARANI, K. BROCH, L.M. PAZOS-OUTON, J. XIAO, T.C. JELLICOE, Jiří NOVÁK, D. HARKIN, A.J. PEARSON, A. RAO, N.C. GREENHAM, M.L. BOHM and R.H. FRIEND. Efficient singlet exciton fission in pentacene prepared from a soluble precursor. APL MATERIALS. MELVILLE: AMER INST PHYSICS, vol. 4, No 11, p. "nestrankovano", 6 pp. ISSN 2166-532X. doi:10.1063/1.4968518. 2016. |
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@article{1367549,
author = {Tabachnyk, M. and Karani, A.H. and Broch, K. and PazosandOuton, L.M. and Xiao, J. and Jellicoe, T.C. and Novák, Jiří and Harkin, D. and Pearson, A.J. and Rao, A. and Greenham, N.C. and Bohm, M.L. and Friend, R.H.},
article_location = {MELVILLE},
article_number = {11},
doi = {http://dx.doi.org/10.1063/1.4968518},
keywords = {exciton fission; photovoltaics; organic semiconductors; pentacene; acenes solubility; FTIR; atomic force microscopy; X-ray diffraction; spin-cotaing; molecular beam deposition},
language = {eng},
issn = {2166-532X},
journal = {APL MATERIALS},
title = {Efficient singlet exciton fission in pentacene prepared from a soluble precursor},
url = {http://aip.scitation.org/doi/10.1063/1.4968518},
volume = {4},
year = {2016}
}
TY - JOUR
ID - 1367549
AU - Tabachnyk, M. - Karani, A.H. - Broch, K. - Pazos-Outon, L.M. - Xiao, J. - Jellicoe, T.C. - Novák, Jiří - Harkin, D. - Pearson, A.J. - Rao, A. - Greenham, N.C. - Bohm, M.L. - Friend, R.H.
PY - 2016
TI - Efficient singlet exciton fission in pentacene prepared from a soluble precursor
JF - APL MATERIALS
VL - 4
IS - 11
SP - "nestrankovano"
EP - "nestrankovano"
PB - AMER INST PHYSICS
SN - 2166532X
KW - exciton fission
KW - photovoltaics
KW - organic semiconductors
KW - pentacene
KW - acenes solubility
KW - FTIR
KW - atomic force microscopy
KW - X-ray diffraction
KW - spin-cotaing
KW - molecular beam deposition
UR - http://aip.scitation.org/doi/10.1063/1.4968518
L2 - http://aip.scitation.org/doi/10.1063/1.4968518
N2 - Carrier multiplication using singlet exciton fission ( SF) to generate a pair of spin-triplet excitons from a single optical excitation has been highlighted as a promising approach to boost the photocurrent in photovoltaics (PVs) thereby allowing PV operation beyond the Shockley-Queisser limit. The applicability of many efficient fission materials, however, is limited due to their poor solubility. For instance, while acene-based organics such as pentacene ( Pc) show high SF yields ( up to 200%), the plain acene backbone renders the organic molecule insoluble in common organic solvents. Previous approaches adding solubilizing side groups such as bis(tri-iso-propylsilylethynyl) to the Pc core resulted in low vertical carrier mobilities due to reduction of the transfer integrals via steric hindrance, which prevented high efficiencies in PVs. Here we show how to achieve good solubility while retaining the advantages of molecular Pc by using a soluble precursor route. The precursor fully converts into molecular Pc through thermal removal of the solubilizing side groups upon annealing above 150 degrees C in the solid state. The annealed precursor shows small differences in the crystallinity compared to evaporated thin films of Pc, indicating that the Pc adopts the bulk rather than surface polytype. Furthermore, we identify identical SF properties such as sub-100 fs fission time and equally long triplet lifetimes in both samples. (C) 2016 Author(s).
ER -
TABACHNYK, M., A.H. KARANI, K. BROCH, L.M. PAZOS-OUTON, J. XIAO, T.C. JELLICOE, Jiří NOVÁK, D. HARKIN, A.J. PEARSON, A. RAO, N.C. GREENHAM, M.L. BOHM and R.H. FRIEND. Efficient singlet exciton fission in pentacene prepared from a soluble precursor. \textit{APL MATERIALS}. MELVILLE: AMER INST PHYSICS, vol.~4, No~11, p.~''nestrankovano'', 6 pp. ISSN~2166-532X. doi:10.1063/1.4968518. 2016.
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