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, 2016, vol. 4, No 11, p. "nestrankovano", 6 pp. ISSN 2166-532X. Available from: https://dx.doi.org/10.1063/1.4968518. |
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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, 2016, vol.~4, No~11, p.~''nestrankovano'', 6 pp. ISSN~2166-532X. Available from: https://dx.doi.org/10.1063/1.4968518.
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