Bipolar polaron pair recombination in polymer/fullerene solar cells

Alexander J. Kupijai; Konstantin M. Behringer; Florian G. Schaeble; Natalie E. Galfe; Michael Corazza; Suren A. Gevorgyan; Frederik C. Krebs; Martin Stutzmann; Martin S. Brandt

doi:10.1103/PhysRevB.92.245203

Bipolar polaron pair recombination in polymer/fullerene solar cells

Alexander J. Kupijai
, Konstantin M. Behringer
, Florian G. Schaeble
, Natalie E. Galfe
, Michael Corazza
, Suren A. Gevorgyan
, Frederik C. Krebs
, Martin Stutzmann
, Martin S. Brandt

TUM Emeriti of Excellence

Walter Schottky Institut
Technical University of Denmark

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We present a study of the rate-limiting spin-dependent charge-transfer processes in different polymer/fullerene bulk-heterojunction solar cells at 10K. Observing central spin-locking signals in pulsed electrically detected magnetic resonance and an inversion of Rabi oscillations in multifrequency electron-double-resonance spectroscopy, we find that the spin response of both spin-coated and printed P3HT/PCBM and spin-coated PCDTBT/PCBM solar cells at low temperatures is governed by bipolar polaron pair recombination and quantitatively determine the polaron-polaron coupling strength with double electron-electron resonance experiments. Furthermore spin Hahn echo decay and inversion recovery measurements are performed to measure spin coherence and recombination times of the polaron pairs, respectively.

Original language	English
Article number	245203
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.92.245203
State	Published - 17 Dec 2015

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10.1103/PhysRevB.92.245203

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title = "Bipolar polaron pair recombination in polymer/fullerene solar cells",

abstract = "We present a study of the rate-limiting spin-dependent charge-transfer processes in different polymer/fullerene bulk-heterojunction solar cells at 10K. Observing central spin-locking signals in pulsed electrically detected magnetic resonance and an inversion of Rabi oscillations in multifrequency electron-double-resonance spectroscopy, we find that the spin response of both spin-coated and printed P3HT/PCBM and spin-coated PCDTBT/PCBM solar cells at low temperatures is governed by bipolar polaron pair recombination and quantitatively determine the polaron-polaron coupling strength with double electron-electron resonance experiments. Furthermore spin Hahn echo decay and inversion recovery measurements are performed to measure spin coherence and recombination times of the polaron pairs, respectively.",

author = "Kupijai, \{Alexander J.\} and Behringer, \{Konstantin M.\} and Schaeble, \{Florian G.\} and Galfe, \{Natalie E.\} and Michael Corazza and Gevorgyan, \{Suren A.\} and Krebs, \{Frederik C.\} and Martin Stutzmann and Brandt, \{Martin S.\}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = dec,

day = "17",

doi = "10.1103/PhysRevB.92.245203",

language = "English",

volume = "92",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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TY - JOUR

T1 - Bipolar polaron pair recombination in polymer/fullerene solar cells

AU - Kupijai, Alexander J.

AU - Behringer, Konstantin M.

AU - Schaeble, Florian G.

AU - Galfe, Natalie E.

AU - Corazza, Michael

AU - Gevorgyan, Suren A.

AU - Krebs, Frederik C.

AU - Stutzmann, Martin

AU - Brandt, Martin S.

PY - 2015/12/17

Y1 - 2015/12/17

N2 - We present a study of the rate-limiting spin-dependent charge-transfer processes in different polymer/fullerene bulk-heterojunction solar cells at 10K. Observing central spin-locking signals in pulsed electrically detected magnetic resonance and an inversion of Rabi oscillations in multifrequency electron-double-resonance spectroscopy, we find that the spin response of both spin-coated and printed P3HT/PCBM and spin-coated PCDTBT/PCBM solar cells at low temperatures is governed by bipolar polaron pair recombination and quantitatively determine the polaron-polaron coupling strength with double electron-electron resonance experiments. Furthermore spin Hahn echo decay and inversion recovery measurements are performed to measure spin coherence and recombination times of the polaron pairs, respectively.

AB - We present a study of the rate-limiting spin-dependent charge-transfer processes in different polymer/fullerene bulk-heterojunction solar cells at 10K. Observing central spin-locking signals in pulsed electrically detected magnetic resonance and an inversion of Rabi oscillations in multifrequency electron-double-resonance spectroscopy, we find that the spin response of both spin-coated and printed P3HT/PCBM and spin-coated PCDTBT/PCBM solar cells at low temperatures is governed by bipolar polaron pair recombination and quantitatively determine the polaron-polaron coupling strength with double electron-electron resonance experiments. Furthermore spin Hahn echo decay and inversion recovery measurements are performed to measure spin coherence and recombination times of the polaron pairs, respectively.

UR - https://www.scopus.com/pages/publications/84952333173

U2 - 10.1103/PhysRevB.92.245203

DO - 10.1103/PhysRevB.92.245203

M3 - Article

AN - SCOPUS:84952333173

SN - 1098-0121

VL - 92

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 24

M1 - 245203

ER -

Bipolar polaron pair recombination in polymer/fullerene solar cells

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