Spin-dependent charge transfer state design rules in organic photovoltaics

Nature Communications
Wendi ChangMarc A Baldo

Abstract

Charge transfer states play a crucial role in organic photovoltaics, mediating both photocurrent generation and recombination losses. In this work, we examine recombination losses as a function of the electron-hole spacing in fluorescent charge transfer states, including direct monitoring of both singlet and triplet charge transfer state dynamics. Here we demonstrate that large donor-acceptor separations minimize back transfer from the charge transfer state to a low-lying triplet exciton 'drain' or the ground state by utilizing external pressure to modulate molecular spacing. The triplet drain quenches triplet charge transfer states that would otherwise be spin protected against recombination, and switches the most efficient origin of the photocurrent from triplet to singlet charge transfer states. Future organic solar cell designs should focus on raising the energy of triplet excitons to better utilize triplet charge transfer mediated photocurrent generation or increasing the donor-acceptor spacing to minimize recombination losses.

References

Oct 15, 1992·Physical Review. B, Condensed Matter·E L FrankevichH H Hörhold
Dec 20, 2003·Physical Review Letters·Conor F Madigan, Vladimir Bulović
Jul 13, 2004·Physical Review Letters·Arne C MorteaniCarlos Silva
Nov 13, 2007·Physical Review Letters·Johanna P SchmidtkeRichard H Friend
Feb 19, 2008·Journal of the American Chemical Society·Hideo OhkitaJames R Durrant
Sep 19, 2008·Journal of the American Chemical Society·Sebastian WestenhoffRichard H Friend
Aug 6, 2009·Accounts of Chemical Research·Jean-Luc BrédasVeaceslav Coropceanu
Oct 13, 2009·Nature Materials·Koen VandewalJean V Manca
Jan 13, 2010·Chemical Reviews·Tracey M Clarke, James R Durrant
Aug 10, 2010·Journal of the American Chemical Society·Jiye LeeTroy Van Voorhis
Aug 31, 2010·Advanced Materials·Carsten DeibelVladimir Dyakonov
Jan 15, 2011·Physical Review Letters·Sebastian Albert-SeifriedRichard H Friend
May 11, 2011·Journal of the American Chemical Society·Fabian EtzoldFrédéric Laquai
Nov 15, 2012·Nature Communications·Jianpu WangNeil C Greenham
Dec 14, 2012·Nature·Hiroki UoyamaChihaya Adachi
Nov 19, 2013·Nature Materials·Koen VandewalAlberto Salleo
Feb 14, 2014·Journal of the American Chemical Society·Philip C Y ChowRichard H Friend

❮ Previous
Next ❯

Citations

Sep 29, 2015·Nature Materials·P B DeotareM A Baldo
Mar 17, 2016·Annual Review of Physical Chemistry·Koen Vandewal
May 31, 2016·The Journal of Physical Chemistry Letters·Chee Kong LeeAdam P Willard
Oct 11, 2016·Chemical Reviews·Oksana Ostroverkhova
May 10, 2017·ACS Applied Materials & Interfaces·Zilong ZhengJean-Luc Brédas
Jun 25, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jamie GibsonThomas J Penfold
Jun 29, 2017·Scientific Reports·S Oviedo-CasadoJ Prior
Sep 14, 2017·Beilstein Journal of Nanotechnology·Konstantin L IvanovJörg Matysik
Mar 3, 2020·The Journal of Chemical Physics·Santiago Oviedo-CasadoJavier Prior
Mar 16, 2021·Journal of the American Chemical Society·Rui WangMin Xiao
Jun 17, 2021·Chemical Reviews·Meera MadhuMahesh Hariharan
May 22, 2018·Journal of Chemical Theory and Computation·Michael G BayneArindam Chakraborty
Jun 1, 2018·The Journal of Physical Chemistry Letters·Saptaparna DasStephen E Bradforth
May 16, 2019·ACS Applied Materials & Interfaces·Jayachandran JayakumarChien-Hong Cheng
Mar 9, 2019·The Journal of Physical Chemistry. a·Y CaoT J Penfold
Aug 16, 2017·Journal of the American Chemical Society·Sabine RichertChristiane R Timmel
May 6, 2019·Journal of Chemical Theory and Computation·Sebastian MaiLeticia González
Aug 24, 2021·Frontiers in Chemistry·Ana M GarciaAmparo Ruiz-Carretero
Jul 27, 2020·ACS Applied Materials & Interfaces·Dong ShenChun-Sing Lee
Jul 7, 2020·ACS Applied Materials & Interfaces·Tao ZhangRussell J Holmes
Oct 1, 2021·Nature·Alexander J GillettRichard H Friend

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.