Data_Sheet_1_Size-Dependent Photophysical Behavior of Low Bandgap Semiconducting Polymer Particles.pdf
The photophysics of water and propan-1-ol suspensions of poly [N-9”-heptadecanyl-2,7-carbazole-alt−5,5-(4,7-di-2-thienyl-2′,1′,3′- benzothiadiazole)] (PCDTBT) nanoparticles and mesoparticles has been studied by ultrafast spectroscopy. High molar mass polymer (HMM > 20 kg/mol) forms nanoparticles with around 50 nm diameter via mini-emulsion post-polymerization, while low molar mass (LMM < 5 kg/mol) polymer prepared by dispersion polymerization results in particles with a diameter of almost one order of magnitude larger (450 ± 50 nm). In this study, the presence of excited-states and charge separated species was identified through UV pump and visible/near-infrared probe femtosecond transient absorption spectroscopy. A different behavior for the HMM nanoparticles has been identified compared to the LMM mesoparticles. The nanoparticles exhibit typical features of an energetically disordered conjugated polymer with a broad density of states, allowing for delayed spectral relaxation of excited states, while the mesoparticles show a J-aggregate-like behavior where interchain interactions are less efficient. Stimulated emission in the red-near infrared region has been found in the mesoparticles which indicates that they present a more energetically ordered system.
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References
- https://doi.org//10.1021/jp411668g
- https://doi.org//10.1021/ja105290e
- https://doi.org//10.1021/ja0771989
- https://doi.org//10.1002/adma.200602496
- https://doi.org//10.1002/ppsc.201400123
- https://doi.org//10.1021/ma00031a015
- https://doi.org//10.1103/PhysRevLett.98.206406
- https://doi.org//10.1016/j.solmat.2016.09.008
- https://doi.org//10.1038/s41467-017-01773-0
- https://doi.org//10.1021/ja201837e
- https://doi.org//10.1039/c3cs60036j
- https://doi.org//10.1021/jp065990a
- https://doi.org//10.1038/nmat4865
- https://doi.org//10.1021/acs.jpclett.7b01936
- https://doi.org//10.1103/PhysRevB.69.085201
- https://doi.org//10.1002/cphc.200400117
- https://doi.org//10.1021/jz200958x
- https://doi.org//10.1021/ma9023747
- https://doi.org//10.1016/j.biomaterials.2017.11.025
- https://doi.org//10.1039/C7RA12164D
- https://doi.org//10.1002/marc.201700614
- https://doi.org//10.1021/nn305207b
- https://doi.org//10.1021/jz201509h
- https://doi.org//10.1103/PhysRevB.88.155202
- https://doi.org//10.1002/marc.201500324
- https://doi.org//10.1021/acs.langmuir.6b04496
- https://doi.org//10.1021/cr100132y
- https://doi.org//10.1016/j.colsurfb.2018.05.055
- https://doi.org//10.1021/la1011742
- https://doi.org//10.1038/ncomms5288
- https://doi.org//10.1002/marc.201700504
- https://doi.org//10.1039/c3tc00829k
- https://doi.org//10.1039/C7TC02255G
- https://doi.org//10.1021/ar900233v
- https://doi.org//10.1021/am502733n
- https://doi.org//10.1103/PhysRevB.81.125210
- https://doi.org//10.1021/jp4104504
- https://doi.org//10.1039/b901302d
- https://doi.org//10.1088/0957-4484/27/24/245601
- https://doi.org//10.1103/PhysRevB.75.224306
- https://doi.org//10.1007/s11664-017-5702-7
- https://doi.org//10.1002/anie.201205133
- https://doi.org//10.1039/C5CC06439B
- https://doi.org//10.3390/polym6112832
- https://doi.org//10.1021/acs.jpcc.8b05505
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