Improvement of photovoltaic response based on enhancement of spin-orbital coupling and triplet states in organic solar cells

2008 ◽  
Vol 103 (4) ◽  
pp. 043909 ◽  
Author(s):  
Zhihua Xu ◽  
Bin Hu ◽  
Jane Howe
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Triplet States ◽  
Spin Orbital ◽  
Photovoltaic Response ◽  
Spin Orbital Coupling

Improvement of Photovoltaic Response Using Triplet Excitons

2006 ◽  
Vol 974 ◽  
Author(s):  
Zhihua Xu ◽  
Bin Hu
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Carriers ◽  
Large Field ◽  
Triplet States ◽  
Spin Orbital ◽  
Photovoltaic Response ◽  
Donor Acceptor ◽  
Triplet Excitons ◽  
Spin Orbital Coupling

ABSTRACTWe report an enhancement of photovoltaic response by dispersing phosphorescent dye fac tris (2-phenylpyridine) iridium (Ir(ppy)3) in organic solar cells of poly[2-methoxy-5-(2¡¦-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) doped with surface-functionalized fullerene 1-(3-methyloxycarbonyl)propy(1-phenyl [6,6] C61 (PCBM). It is known that photoexcitation generates both singlet and triplet states through intersystem crossing caused by hyperfine or spin-orbital coupling. Due to long diffusion length the triplet excitons can migrate from their generation sites to the interfaces of donor-acceptor interaction and directly dissociate into charge carriers. We found, based on the studies of magnetic field-dependent photocurrent, that the dispersed Ir(ppy)3 molecules increase the spin-orbital coupling strength and triplet density in the MEH-PPV matrix due to the penetration of MEH-PPV π electrons into the large field of orbital dipoles of the Ir(ppy)3. Especially, the triplet excitons facilitate the direct dissociation into charge carriers at the donor-acceptor interacting interfaces in the composite of MEH-PPV and PCBM, and consequently improve the photovoltaic response in organic solar cells.

scholarly journals On the absence of triplet exciton loss pathways in non-fullerene acceptor based organic solar cells

2020 ◽  
Vol 7 (6) ◽  
pp. 1641-1649 ◽  
Author(s):  
Maria S. Kotova ◽  
Giacomo Londi ◽  
Johannes Junker ◽  
Stefanie Dietz ◽  
Alberto Privitera ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Triplet Exciton ◽  
Triplet States ◽  
Donor And Acceptor ◽  
Recombination Channel

Recombination to donor and acceptor triplet states should be energetically favourable. However, this recombination channel is not observed in operational devices.

Introducing optically polarizable molecules into perovskite solar cells by simultaneously enhanced spin–orbital coupling, suppressed non-radiative recombination and improved transport balance towards enhancing photovoltaic actions

2018 ◽  
Vol 6 (23) ◽  
pp. 6164-6171 ◽  
Author(s):  
Changfeng Han ◽  
Haomiao Yu ◽  
Jiashun Duan ◽  
Kai Lu ◽  
Jia Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Radiative Recombination ◽  
Perovskite Solar Cells ◽  
Spin Orbital ◽  
Spin Orbital Coupling

Introducing optically polarizable molecules into perovskite solar cells can enhance photovoltaic actions.

Enhancing photovoltaic response of organic solar cells using a crystalline molecular template

2012 ◽  
Vol 13 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Wei Zhao ◽  
John P. Mudrick ◽  
Ying Zheng ◽  
William T. Hammond ◽  
Yixing Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photovoltaic Response

Exploring spin-orbital coupling effects on photovoltaic actions in Sn and Pb based perovskite solar cells

Nano Energy ◽  
2017 ◽  
Vol 38 ◽  
pp. 297-303 ◽  
Author(s):  
Jia Zhang ◽  
Ting Wu ◽  
Jiashun Duan ◽  
Mahshid Ahmadi ◽  
Fangyuan Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Coupling Effects ◽  
Spin Orbital ◽  
Spin Orbital Coupling

An Efficient Imine Photocyclization as an Alternative to the Pictet-Spengler Reaction for the Synthesis of AzaBenzannulated Perylenediimide Dyes

2020 ◽  
Author(s):  
Antoine Goujon ◽  
Lou Rocard ◽  
Thomas Cauchy ◽  
Piétrick Hudhomme
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Organic Solar Cells ◽  
Reaction Sequence ◽  
Large Scope ◽  
High Yields

AzaBenzannulated PDI (AzaBPDI) dyes were synthesized in high yields via a new reaction sequence involving an imine condensation followed by visible light-induced photocyclization. The large scope and efficiency of this alternative to the Pictet-Spengler reaction is demonstrated, and allows the easy preparation of dimeric AzaBPDI as potential non-fullerene acceptors for organic solar cells.

Boron-Nitrogen Doped Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells

2019 ◽  
Author(s):  
Matthew Morgan ◽  
Maryam Nazari ◽  
Thomas Pickl ◽  
J. Mikko Rautiainen ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Broad Absorption ◽  
Nitrogen Doped ◽  
Large Depth ◽  
End Products ◽  
Boron Nitrogen ◽  
The Way

The electrophilic borylation of 2,5-diarylpyrazines results in the formation of boron-nitrogen doped dihydroindeno[1,2-<i>b</i>]fluorene which can be synthesized via mildly air-sensitive techniques and the end products handled readily under atmosphereic conditions. Through transmetallation via diarylzinc reagents a series of derivatives were sythesized which show broad absorption profiles that highlight the versatility of this backbone to be used in organic solar cell devices. These compounds can be synthesized in large yields, in alow number of steps and functionalized at many stages along the way providing a large depth of possibilities. Exploratory device paramaters were studied and show PCE of 2%.

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