Improved charge carrier dynamics in polymer/perovskite nanocrystal based hybrid ternary solar cells

Journal article
(Original article)


Publication Details

Author(s): Soltani R, Puscher B, Katbab AA, Levchuk I, Kazerouni N, Gasparini N, Camaioni N, Osvet A, Batentschuk M, Fink R, Guldi DM, Ameri T
Journal: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
Publication year: 2018
Volume: 20
Journal issue: 36
Pages range: 23674-23683
ISSN: 1463-9076
eISSN: 1463-9084
Language: English


Abstract

Here, brand new ternary hybrid solar cells comprising perovskite nanocrystals (NCs) with a complementary absorption profile of the organic host matrix are reported. In particular, NH2CHNH2PbI3 (FAPbI3) perovskite NCs are implemented in bulk heterojunction organic solar cells based on the pDPP5T-2 electron donating polymer and a [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) acceptor at various loading amounts and the fabricated hybrid
photovoltaics are thoroughly studied by employing different
optoelectrical characterization methods. Current-voltage measurements
and photoinduced charge carrier extraction by linear increasing voltage (photo-CELIV) reveal improved charge generation and charge transport properties upon incorporation of perovskite NCs into the photo-active layer of the hybrid solar cell. The power conversion efficiency (PCE) of the hybrid solar cell comprising 5% perovskite
NCs is 10% enhanced compared to the organic reference, mainly due to
the enlarged light harvesting and increased short circuit current
density (Jsc). However, results suggest that introducing a higher amount of perovskite content induces bimolecular and trap-assisted recombination in the ternary devices. We perform a comprehensive transient absorption study of the charge
transfer/transport mechanisms by employing femto-second pump-probe
transient absorption spectroscopy (fs-TAS). fs-TAS measurements
demonstrate a slower charge carrier recombination rate due to the introduction of perovskite NCs into the photoactive layer. Results reveal that DPP injects electrons from the singlet excited state into the perovskite NCs, which causes the desired cascading charge carrier transfer. In ternary blends, a small amount of FAPbI3 NCs provides an additional pathway in favor of the charge-separated
state via the NCs, which, despite accelerating the depopulation of
DPP's singlet excited state slightly slows down the charge-separation process between DPP and PC61BM. Interestingly, the loss processes are slowed down; an effect that is more important and, hence, explains the improved solar cell efficiency. © 2018 the Owner Societies.


FAU Authors / FAU Editors

Ameri, Tayebeh Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Batentschuk, Miroslaw PD Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Fink, Rainer Prof. Dr.
Professur für Physikalische Chemie
Gasparini, Nicola
Institute Materials for Electronics and Energy Technology (i-MEET)
Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Kazerouni, Negar
Institute Materials for Electronics and Energy Technology (i-MEET)
Levchuk, Ievgen
Institute Materials for Electronics and Energy Technology (i-MEET)
Osvet, Andres Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Puscher, Bianka
Lehrstuhl für Physikalische Chemie I


External institutions
Amirkabir University of Technology (AUT) / دانشگاه صنعتی امیرکبیر
The Institute of Organic Synthesis and Photoreactivity (ISOF)


How to cite

APA:
Soltani, R., Puscher, B., Katbab, A.A., Levchuk, I., Kazerouni, N., Gasparini, N.,... Ameri, T. (2018). Improved charge carrier dynamics in polymer/perovskite nanocrystal based hybrid ternary solar cells. Physical Chemistry Chemical Physics, 20(36), 23674-23683. https://dx.doi.org/10.1039/c8cp03743d

MLA:
Soltani, Rezvan, et al. "Improved charge carrier dynamics in polymer/perovskite nanocrystal based hybrid ternary solar cells." Physical Chemistry Chemical Physics 20.36 (2018): 23674-23683.

BibTeX: 

Last updated on 2018-09-11 at 10:08