Free carrier generation and recombination in PbS quantum dot solar cells

Jona Kurpiers; Daniel M. Balazs; Andreas Paulke; Steve Albrecht; Ilja Lange; Loredana Protesescu; Maksym V. Kovalenko; Maria Antonietta Loi; Dieter Neher

doi:10.1063/1.4943379

Free carrier generation and recombination in PbS quantum dot solar cells

Jona Kurpiers
, Daniel M. Balazs
, Andreas Paulke
, Steve Albrecht
, Ilja Lange
, Loredana Protesescu
, Maksym V. Kovalenko
, Maria Antonietta Loi
, Dieter Neher^*

^*Corresponding author for this work

Photophysics and OptoElectronics

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

12 Citations (Scopus)

635 Downloads (Pure)

Abstract

Time Delayed Collection Field and Bias Assisted Charge Extraction (BACE) experiments are used to investigate the charge carrier dynamics in PbS colloidal quantum dot solar cells. We find that the free charge carrier creation is slightly field dependent, thus providing an upper limit to the fill factor. The BACE measurements reveal a rather high effective mobility of 2 x 10(-3) cm(2)/Vs, meaning that charge extraction is efficient. On the other hand, a rather high steady state non-geminate recombination coefficient of 3 x 10(-10) cm(3)/s is measured. We, therefore, propose a rapid free charge recombination to constitute the main origin for the limited efficiency of the PbS colloidal quantum dots cells. (C) 2016 AIP Publishing LLC.

Original language	English
Article number	103102
Number of pages	5
Journal	Applied Physics Letters
Volume	108
Issue number	10
DOIs	https://doi.org/10.1063/1.4943379
Publication status	Published - 7-Mar-2016

Keywords

FIELD-EFFECT TRANSISTORS
OPEN-CIRCUIT VOLTAGE
HIGH-MOBILITY
HETEROJUNCTION
STATES
FILMS
NANOCRYSTALS
EXTRACTION
DEPENDENCE
DENSITY

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title = "Free carrier generation and recombination in PbS quantum dot solar cells",

abstract = "Time Delayed Collection Field and Bias Assisted Charge Extraction (BACE) experiments are used to investigate the charge carrier dynamics in PbS colloidal quantum dot solar cells. We find that the free charge carrier creation is slightly field dependent, thus providing an upper limit to the fill factor. The BACE measurements reveal a rather high effective mobility of 2 x 10(-3) cm(2)/Vs, meaning that charge extraction is efficient. On the other hand, a rather high steady state non-geminate recombination coefficient of 3 x 10(-10) cm(3)/s is measured. We, therefore, propose a rapid free charge recombination to constitute the main origin for the limited efficiency of the PbS colloidal quantum dots cells. (C) 2016 AIP Publishing LLC.",

keywords = "FIELD-EFFECT TRANSISTORS, OPEN-CIRCUIT VOLTAGE, HIGH-MOBILITY, HETEROJUNCTION, STATES, FILMS, NANOCRYSTALS, EXTRACTION, DEPENDENCE, DENSITY",

author = "Jona Kurpiers and Balazs, \{Daniel M.\} and Andreas Paulke and Steve Albrecht and Ilja Lange and Loredana Protesescu and Kovalenko, \{Maksym V.\} and Loi, \{Maria Antonietta\} and Dieter Neher",

year = "2016",

month = mar,

day = "7",

doi = "10.1063/1.4943379",

language = "English",

volume = "108",

journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - Free carrier generation and recombination in PbS quantum dot solar cells

AU - Kurpiers, Jona

AU - Balazs, Daniel M.

AU - Paulke, Andreas

AU - Albrecht, Steve

AU - Lange, Ilja

AU - Protesescu, Loredana

AU - Kovalenko, Maksym V.

AU - Loi, Maria Antonietta

AU - Neher, Dieter

PY - 2016/3/7

Y1 - 2016/3/7

N2 - Time Delayed Collection Field and Bias Assisted Charge Extraction (BACE) experiments are used to investigate the charge carrier dynamics in PbS colloidal quantum dot solar cells. We find that the free charge carrier creation is slightly field dependent, thus providing an upper limit to the fill factor. The BACE measurements reveal a rather high effective mobility of 2 x 10(-3) cm(2)/Vs, meaning that charge extraction is efficient. On the other hand, a rather high steady state non-geminate recombination coefficient of 3 x 10(-10) cm(3)/s is measured. We, therefore, propose a rapid free charge recombination to constitute the main origin for the limited efficiency of the PbS colloidal quantum dots cells. (C) 2016 AIP Publishing LLC.

AB - Time Delayed Collection Field and Bias Assisted Charge Extraction (BACE) experiments are used to investigate the charge carrier dynamics in PbS colloidal quantum dot solar cells. We find that the free charge carrier creation is slightly field dependent, thus providing an upper limit to the fill factor. The BACE measurements reveal a rather high effective mobility of 2 x 10(-3) cm(2)/Vs, meaning that charge extraction is efficient. On the other hand, a rather high steady state non-geminate recombination coefficient of 3 x 10(-10) cm(3)/s is measured. We, therefore, propose a rapid free charge recombination to constitute the main origin for the limited efficiency of the PbS colloidal quantum dots cells. (C) 2016 AIP Publishing LLC.

KW - FIELD-EFFECT TRANSISTORS

KW - OPEN-CIRCUIT VOLTAGE

KW - HIGH-MOBILITY

KW - HETEROJUNCTION

KW - STATES

KW - FILMS

KW - NANOCRYSTALS

KW - EXTRACTION

KW - DEPENDENCE

KW - DENSITY

U2 - 10.1063/1.4943379

DO - 10.1063/1.4943379

M3 - Article

SN - 0003-6951

VL - 108

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

M1 - 103102

ER -

Free carrier generation and recombination in PbS quantum dot solar cells

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Keywords

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