Strongly exchange-coupled triplet pairs in an organic semiconductor

被引：0

作者：

Weiss L.R. ^{[1
]}

Bayliss S.L. ^{[1
]}

Kraffert F. ^{[2
]}

Thorley K.J. ^{[3
]}

Anthony J.E. ^{[3
]}

Bittl R. ^{[2
]}

Friend R.H. ^{[1
]}

Rao A. ^{[1
]}

Greenham N.C. ^{[1
]}

Behrends J. ^{[2
]}

机构：

[1] Cavendish Laboratory, J.J. Thomson Avenue, University of Cambridge, Cambridge

[2] Berlin Joint EPR Lab, Fachbereich Physik, Freie Universität Berlin, Berlin

[3] Department of Chemistry, University of Kentucky, Lexington, 40506-0055, KY

来源：

Nature Physics | 2017年 / 13卷 / 2期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1038/nphys3908

中图分类号：

学科分类号：

摘要：

From biological complexes to devices based on organic semiconductors, spin interactions play a key role in the function of molecular systems. For instance, triplet-pair reactions impact operation of organic light-emitting diodes as well as photovoltaic devices. Conventional models for triplet pairs assume they interact only weakly. Here, using electron spin resonance, we observe long-lived, strongly interacting triplet pairs in an organic semiconductor, generated via singlet fission. Using coherent spin manipulation of these two-triplet states, we identify exchange-coupled (spin-2) quintet complexes coexisting with weakly coupled (spin-1) triplets. We measure strongly coupled pairs with a lifetime approaching 3 μs and a spin coherence time approaching 1 μs, at 10 K. Our results pave the way for the utilization of high-spin systems in organic semiconductors. © 2017 Macmillan Publishers Limited.

引用

页码：176 / 181

页数：5

共 50 条

[31] PHOTOLUMINESCENCE OF EXCHANGE-COUPLED MO3+ PAIRS IN CSMGCL3
MARNEY, K
FRANCIS, AH
MCPHERSON, GL
MCCARTHY, PJ
JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (02) : 535 - 544
[32] EVIDENCE OF EXCHANGE-COUPLED PAIRS RELAXATION IN SRF2-YB3+
VELTERSTEFANESCU, M
NISTOR, SV
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1985, 18 (32): : 6043 - 6049
[33] APPEARANCE OF CROSS RELAXATION AND SPECTRUM OF EXCHANGE-COUPLED ION PAIRS IN PARAMAGNETIC CRYSTALS
MASH, ID
RODAK, MI
SOVIET PHYSICS SOLID STATE,USSR, 1965, 7 (03): : 576 - +
[34] Stimulated Electron Spin Polarization in Strongly Coupled Triplet–Doublet Spin Pairs
Yuri E. Kandrashkin
Art van der Est
Applied Magnetic Resonance, 2011, 40 : 189 - 204
[35] Raman scattering in strongly coupled organic semiconductor microcavities
Tartakovskii, AI
Emam-Ismail, M
Lidzey, DG
Skolnick, MS
Bradley, DDC
Walker, S
Agranovich, VM
PHYSICAL REVIEW B, 2001, 63 (12)
[36] High-fidelity gate set for exchange-coupled singlet-triplet qubits
Cerfontaine, Pascal
Otten, Rene
Wolfe, M. A.
Bethke, Patrick
Bluhm, Hendrik
PHYSICAL REVIEW B, 2020, 101 (15)
[37] Environmental noise effects on entanglement fidelity of exchange-coupled semiconductor spin qubits
Throckmorton, Robert E.
Barnes, Edwin
Das Sarma, S.
PHYSICAL REVIEW B, 2017, 95 (08)
[38] EXCHANGE-COUPLED POLYMETALLIC SYSTEMS
DRILLON, M
DARRIET, J
JOURNAL OF CHEMICAL RESEARCH-S, 1987, (05): : 148 - 149
[39] The coercivity of exchange-coupled nanolayers
Zhao, G. P.
Wang, X. L.
2006 INTERNATIONAL CONFERENCE ON NANOSCIENCE AND NANOTECHNOLOGY, VOLS 1 AND 2, 2006, : 164 - +
[40] ELECTRON-SPIN RESONANCE OF EXCHANGE-COUPLED PAIRS IN GAAS-FE CRYSTALS
MASTEROV, VF
POPOV, BP
SOVIET PHYSICS SEMICONDUCTORS-USSR, 1978, 12 (02): : 234 - 235

← 1 2 3 4 5 →