Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics

Ivan Mora-Sero; Luca Bertoluzzi; Victoria Gonzalez-Pedro; Sixto Gimenez; Francisco Fabregat-Santiago; Kyle W. Kemp; Edward H. Sargent; Juan Bisquert

doi:10.1038/ncomms3272

Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics

Ivan Mora-Sero, Luca Bertoluzzi, Victoria Gonzalez-Pedro, Sixto Gimenez, Francisco Fabregat-Santiago, Kyle W. Kemp, Edward H. Sargent, Juan Bisquert

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

58 Scopus citations

Abstract

Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. © 2013 Macmillan Publishers Limited. All rights reserved.

Original language	English (US)
Journal	Nature Communications
Volume	4
Issue number	1
DOIs	https://doi.org/10.1038/ncomms3272
State	Published - Aug 12 2013
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-11-009-21
Acknowledgements: We thank the following agencies for support of this research: Ministerio de Educacion y Ciencia under project HOPE CSD2007-00007, Generalitat Valenciana (ISIC/2012/008) and Universitat Jaume I project 12I361.01/1. EHS and KWK acknowledge the Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST) and the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

Access to Document

10.1038/ncomms3272

https://repository.kaust.edu.sa/bitstream/10754/597008/1/ncomms3272.pdf

Cite this

@article{457f249e1495455cbddfcd0205def5ce,

title = "Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics",

abstract = "Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. {\textcopyright} 2013 Macmillan Publishers Limited. All rights reserved.",

author = "Ivan Mora-Sero and Luca Bertoluzzi and Victoria Gonzalez-Pedro and Sixto Gimenez and Francisco Fabregat-Santiago and Kemp, {Kyle W.} and Sargent, {Edward H.} and Juan Bisquert",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: We thank the following agencies for support of this research: Ministerio de Educacion y Ciencia under project HOPE CSD2007-00007, Generalitat Valenciana (ISIC/2012/008) and Universitat Jaume I project 12I361.01/1. EHS and KWK acknowledge the Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST) and the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2013",

month = aug,

day = "12",

doi = "10.1038/ncomms3272",

language = "English (US)",

volume = "4",

journal = "Nature Communications",

issn = "2041-1723",

publisher = "Nature Research",

number = "1",

}

TY - JOUR

T1 - Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics

AU - Mora-Sero, Ivan

AU - Bertoluzzi, Luca

AU - Gonzalez-Pedro, Victoria

AU - Gimenez, Sixto

AU - Fabregat-Santiago, Francisco

AU - Kemp, Kyle W.

AU - Sargent, Edward H.

AU - Bisquert, Juan

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-11-009-21 Acknowledgements: We thank the following agencies for support of this research: Ministerio de Educacion y Ciencia under project HOPE CSD2007-00007, Generalitat Valenciana (ISIC/2012/008) and Universitat Jaume I project 12I361.01/1. EHS and KWK acknowledge the Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST) and the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2013/8/12

Y1 - 2013/8/12

N2 - Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. © 2013 Macmillan Publishers Limited. All rights reserved.

AB - Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. © 2013 Macmillan Publishers Limited. All rights reserved.

UR - http://hdl.handle.net/10754/597008

UR - http://www.nature.com/articles/ncomms3272

UR - http://www.scopus.com/inward/record.url?scp=84883118673&partnerID=8YFLogxK

U2 - 10.1038/ncomms3272

DO - 10.1038/ncomms3272

M3 - Article

C2 - 23934367

SN - 2041-1723

VL - 4

JO - Nature Communications

JF - Nature Communications

IS - 1

ER -

Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this