Journal ArticleDOI
Excited-state dynamics in diketopyrrolopyrrole-based copolymer for organic photovoltaics investigated by transient optical spectroscopy
Hiroyuki Matsuzaki,Akihiro Furube,Ryuzi Katoh,Samarendra P. Singh,Prashant Sonar,Evan L. Williams,Chellappan Vijila,Gomathy Sandhya Subramanian,Sergey Gorelik,Jonathan Hobley +9 more
TLDR
In this paper, the photoexcited state dynamics in a donor-acceptor copolymer, poly{3,6-dithiophene-2-yl-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4dione-alt-naphthalene} (pDPP-TNT), by picosecond fluorescence and femtosecond transient absorption spectroscopies.Abstract:
We investigate the photoexcited state dynamics in a donor?acceptor copolymer, poly{3,6-dithiophene-2-yl-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-naphthalene} (pDPP-TNT), by picosecond fluorescence and femtosecond transient absorption spectroscopies. Time-resolved fluorescence lifetime measurements of pDPP-TNT thin films reveal that the lifetime of the singlet excited state is 185 ? 5 ps and that singlet?singlet annihilation occurs at excitation photon densities above 6 ? 1017 photons/cm3. From the results of singlet?singlet annihilation analysis, we estimate that the single-singlet annihilation rate constant is (6.0 ? 0.2) ? 10?9 cm3 s?1 and the singlet diffusion length is ~7 nm. From the comparison of femtosecond transient absorption measurements and picosecond fluorescence measurements, it is found that the time profile of the photobleaching signal in the charge-transfer (CT) absorption band coincides with that of the fluorescence intensity and there is no indication of long-lived species, which clearly suggests that charged species, such as polaron pairs and triplet excitons, are not effectively photogenerated in the neat pDPP-TNT polymer.read more
Citations
More filters
Journal ArticleDOI
Driving Force Dependence of Electron Transfer Kinetics and Yield in Low-Band-Gap Polymer Donor–Acceptor Organic Photovoltaic Blends
Brendan Wright,Kenji Sunahara,Akihiro Furube,Andrew Nattestad,Tracey M. Clarke,Guillermo C. Bazan,Jason D. Azoulay,Attila J. Mozer +7 more
TL;DR: In this article, the rate of photoinduced electron transfer (PET), quantum yield of PET (QYPET), and charge extraction yield (EQE) were determined for a series of donor-acceptor (DA) organic photovoltaic systems, comprising low-band-gap polymer donors and the phenyl-C61-butyric acid methyl ester (PCBM) acceptor.
Journal ArticleDOI
Investigating the Optical Properties of Thiophene Additions to s-Indacene Donors with Diketopyrrolopyrrole, Isoindigo, and Thienothiophene Acceptors
Bradley Keller,Zhengxu Cai,Angelar K. Muthike,Prabhat Kumar Sahu,Hyungjun Kim,Audrey Eshun,Paul M. Zimmerman,Deqing Zhang,Theodore Goodson +8 more
TL;DR: In this article, the effects of donor conjugation length and donor-acceptor combination on the optical properties of the synthesized polymers were investigated using steady state, up-conversion, quantum chemical simulations and ultrafast and transient spectroscopic techniques.
Journal ArticleDOI
Charge Generation and Recombination in Diketopyrrolopyrrole Polymer: Fullerene Bulk Heterojunctions Studied by Transient Absorption and Time-Resolved Microwave Conductivity
Ryuzi Katoh,Ryuzi Katoh,Hiroyuki Matsuzaki,Akihiro Furube,Akihiro Furube,Prashant Sonar,Evan L. Williams,Chellappan Vijila,Gomathy Sandhya Subramanian,Sergey Gorelik,Jonathan Hobley +10 more
TL;DR: In this article, the authors used femtosecond transient absorption (ns-TA) and time-resolved microwave conductivity (TRMC) measurements to study charge recombination in organic photovoltaic bulk heterojunction films.
Journal ArticleDOI
A bis(diketopyrrolopyrrole) dimer-containing ligand in platinum(II) polyyne oligomers exhibiting ultrafast photoinduced electron transfer with PCBM and solar cell properties
Melodie Nos,Gabriel Marineau-Plante,Di Gao,Muriel Durandetti,Julie Hardouin,Paul-Ludovic Karsenti,Gaurav Gupta,Ganesh D. Sharma,Pierre D. Harvey,Cyprien Lemouchi,Loïc Le Pluart +10 more
TL;DR: In this paper, two polyyne oligomers using the thiophene unit, TDPP-T and organometallic synthon trans-Pt(PBu3)2(CC)2, [Pt], were synthesized by CuI-catalyzed dehydrohalogenation and fully characterized.
Dissertation
From Small Molecules to Polymers: Linear and Nonlinear Optical Properties of Organic Conjugated Systems for Solar Applications
TL;DR: It is suggested that within the next few weeks the population of this region will begin to decline, and the number of people in this area in general will increase.
References
More filters
Journal ArticleDOI
Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
Journal ArticleDOI
High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends
TL;DR: In this article, the authors report highly efficient polymer solar cells based on a bulk heterojunction of polymer poly(3-hexylthiophene) and methanofullerene.
Journal ArticleDOI
Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology
TL;DR: By applying specific fabrication conditions summarized in the Experimental section and post-production annealing at 150°C, polymer solar cells with power-conversion efficiency approaching 5% were demonstrated.
Journal ArticleDOI
Polymer‐Fullerene Bulk‐Heterojunction Solar Cells
Christoph J. Brabec,Srinivas (Jimmy) Gowrisanker,Jonathan Halls,Darin W. Laird,Shijun Jia,Shawn P. Williams +5 more
TL;DR: An outlook is presented on what will be required to drive this young photovoltaic technology towards the next major milestone, a 10% power conversion efficiency, considered by many to represent the efficiency at which OPV can be adopted in wide-spread applications.
Journal ArticleDOI
A polymer tandem solar cell with 10.6% power conversion efficiency
Jingbi You,Letian Dou,Ken Yoshimura,Takehito Kato,Kenichiro Ohya,Tom Moriarty,Keith Emery,Chun-Chao Chen,Jing Gao,Gang Li,Yang Yang +10 more
TL;DR: The development of a high-performance low bandgap polymer that enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions, which is the first certified polymer solar cell efficiency over 10%.