scholarly journals Activating intramolecular singlet exciton fission by altering π-bridge flexibility in perylene diimide trimers for organic solar cells

2020 ◽  
Vol 11 (33) ◽  
pp. 8757-8770
Author(s):  
Benedetta Carlotti ◽  
Ifeanyi K. Madu ◽  
Hyungjun Kim ◽  
Zhengxu. Cai ◽  
Hanjie Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Perylene Diimide ◽  
Intersystem Crossing ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Singlet Exciton ◽  
Singlet Exciton Fission ◽  
Triplet Formation

We show via time resolved spectroscopy that triplet formation proceeds via intersystem crossing in a rigid-bridged perylene diimide trimer and via efficient and fast intramolecular singlet exciton fission in the analogous flexible-bridged trimer.

Time-resolved spectroscopy of charge transfer phenomena in organic solar cells

2015 ◽  
Author(s):  
Marina Gerhard ◽  
Andreas Arndt ◽  
Aina Quintilla ◽  
Arash Rahimi-Iman ◽  
Uli Lemmer ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Singlet Exciton Fission in Nanostructured Organic Solar Cells

Nano Letters ◽  
2011 ◽  
Vol 11 (4) ◽  
pp. 1495-1498 ◽  
Author(s):  
Priya J. Jadhav ◽  
Aseema Mohanty ◽  
Jason Sussman ◽  
Jiye Lee ◽  
Marc A. Baldo
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

scholarly journals Ultrafast spectroscopy reveals singlet fission, ionization and excimer formation in perylene film

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wenjun Ni ◽  
Licheng Sun ◽  
Gagik G. Gurzadyan
Keyword(s):  
Radical Cation ◽  
Transient Absorption ◽  
Photovoltaic Devices ◽  
Singlet Fission ◽  
Time Resolved ◽  
Singlet Exciton ◽  
Femtosecond Transient Absorption ◽  
Photovoltaic Applications ◽  
Singlet Exciton Fission ◽  
Triplet Formation

AbstractSinglet exciton fission (SF) is a spin-allowed process whereby two triplet excitons are created from one singlet exciton. This phenomenon can offset UV photon energy losses and enhance the overall efficiency in photovoltaic devices. For this purpose, it requires photostable commercially available SF materials. Excited state dynamics in pure perylene film, ease of commercial production, is studied by time-resolved fluorescence and femtosecond transient absorption techniques under different photoexcitation energies. In film, polycrystalline regions contain perylene in H-type aggregate form. SF takes place from higher excited states of these aggregates in ultrafast time scale < 30 fs, reaching a triplet formation quantum yield of 108%. Moreover, at λex = 450 nm singlet fission was detected as a result of two-quantum absorption. Other competing relaxation channels are excimer (1 ps) and dimer radical cation formation (< 30 fs). Excimer radiatively relaxes within 19 ns and radical cation recombines in 3.2 ns. Besides, exciton self-trapping by crystal lattice distortions occurs within hundreds of picosecond. Our results highlight potential of simple-fabricated perylene films with similar properties as high-cost single crystal in SF based photovoltaic applications.

scholarly journals Loss mechanisms in organic solar cells based on perylene diimide acceptors studied by time-resolved photoluminescence

2016 ◽  
Author(s):  
Marina Gerhard ◽  
Dominik Gehrig ◽  
Ian A. Howard ◽  
Andreas P. Arndt ◽  
Mühenad Bilal ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Perylene Diimide ◽  
Time Resolved ◽  
Time Resolved Photoluminescence ◽  
Loss Mechanisms

Excited States of C70and the Intersystem Crossing Process Studied by Picosecond Time-Resolved Spectroscopy in the Visible and Near-IR Region

1996 ◽  
Vol 100 (25) ◽  
pp. 10518-10522 ◽  
Author(s):  
Akira Watanabe ◽  
Osamu Ito ◽  
Motoyuki Watanabe ◽  
Haruhisa Saito ◽  
Musubu Koishi
Keyword(s):  
Excited States ◽  
Intersystem Crossing ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Near Ir

scholarly journals Slow light enhanced singlet exciton fission solar cells with a 126% yield of electrons per photon

2013 ◽  
Vol 103 (26) ◽  
pp. 263302 ◽  
Author(s):  
Nicholas J. Thompson ◽  
Daniel N. Congreve ◽  
David Goldberg ◽  
Vinod M. Menon ◽  
Marc A. Baldo
Keyword(s):  
Solar Cells ◽  
Slow Light ◽  
Singlet Exciton ◽  
Singlet Exciton Fission

scholarly journals Symmetry Induced Orderly Assembly Achieving High-Performance Perylene Diimide-based Non-Fullerene Organic Solar Cells

CCS Chemistry ◽  
2020 ◽  
pp. 1-18
Author(s):  
Shangshang Chen ◽  
Dong Meng ◽  
Jiachen Huang ◽  
Ningning Liang ◽  
Yan Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Perylene Diimide

Benzotriazacycle Cored Perylene Diimide Non-fullerene Acceptors for High-performance Organic Solar Cells

2021 ◽  
Vol 01 ◽  
Author(s):  
Min Deng ◽  
Zhenkai Ji ◽  
Xiaopeng Xu ◽  
Liyang Yu ◽  
Qiang Peng
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Performance ◽  
Energy Levels ◽  
Three Dimensional ◽  
Molecular Structures ◽  
Perylene Diimide ◽  
Photon Absorption ◽  
Optoelectronic Property ◽  
Design Synthesis

Background: Perylene diimide (PDI) is among the most investigated non-fullerene electron acceptor for organic solar cells (OSCs). Constructing PDI derivatives into three-dimensional propeller-like molecular structures is not only one of the viable routes to suppress the over aggregation tendency of the PDI chromophores, but also raises possibilities to tune and optimize the optoelectronic property of the molecules. Objective: In this work, we reported the design, synthesis, and characterization of three electron-accepting materials, namely BOZ-PDI, BTZ-PDI, and BIZ-PDI, each with three PDI arms linked to benzotrioxazole, benzotrithiazole, and benzotriimidazole based center cores, respectively. Method: The introduction of electron-withdrawing center cores with heteroatoms does not significantly complicate the synthesis of the acceptor molecules but drastically influences the energy levels of the propeller-like PDI derivatives. Result: The highest power conversion efficiency was obtained with benzoxazole-based BOZ-PDI reaching 7.70% for its higher photon absorption and charge transport ability. Conclusion: This work explores the utilization of electron-withdrawing cores with heteroatoms in the propeller-like PDI derivatives, which provides a handy tool to construct high-performance non-fullerene acceptor materials.

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