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  4. Addition of adamantylammonium iodide to hole transport layers enables highly efficient and electroluminescent perovskite solar cells
 
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research article

Addition of adamantylammonium iodide to hole transport layers enables highly efficient and electroluminescent perovskite solar cells

Tavakoli, Mohammad Mahdi
•
Tress, Wolfgang  
•
Milic, Jovana V.
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November 1, 2018
Energy & Environmental Science

The efficiency of perovskite solar cells (PSCs) is currently limited by non-radiative recombination losses. One potential loss channel consists of electrons recombining at the interface with the hole transport layer (HTL). We synthesized adamantylammonium halides (ADAHX, X = Cl-, Br-, I-) and demonstrated that ADAHI interacts with the perovskite surface using solid-state NMR spectroscopy. As a result, ADAHI reduces non-radiative recombination when added to the HTL, raising the PSC photovoltage to an average value of 1.185 V, the power conversion efficiency (PCE) to almost 22%, and the maximum external electroluminescence quantum yield to 2.5% at an injection current that is equal to the photocurrent under solar illumination. The lowest value measured for the loss in potential is only 365 mV with respect to the band gap, surpassing the highest-efficiency silicon solar cells. Devices with ADAHI-modified HTL show excellent operational stability for 500 hours. We show the general validity of our new approach for a variety of perovskite formulations and hole conductors.

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Type
research article
DOI
10.1039/c8ee02404a
Web of Science ID

WOS:000449843300019

Author(s)
Tavakoli, Mohammad Mahdi
•
Tress, Wolfgang  
•
Milic, Jovana V.
•
Kubicki, Dominik  
•
Emsley, Lyndon  
•
Gratzel, Michael  
Date Issued

2018-11-01

Publisher

ROYAL SOC CHEMISTRY

Published in
Energy & Environmental Science
Volume

11

Issue

11

Start page

3310

End page

3320

Subjects

Chemistry, Multidisciplinary

•

Energy & Fuels

•

Engineering, Chemical

•

Environmental Sciences

•

Chemistry

•

Engineering

•

Environmental Sciences & Ecology

•

open-circuit voltage

•

solid-state nmr

•

sequential deposition

•

hybrid perovskites

•

high-performance

•

interface

•

recombination

•

degradation

•

passivation

•

stability

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LRM  
LPI  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/151999
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