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Schedel C, Strauß F, Kumar K, Maier A, Wurst KM, Michel P, Scheele M. Substrate Effects on the Bandwidth of CdSe Quantum Dot Photodetectors. ACS Appl Mater Interfaces 2021; 13:47954-47961. [PMID: 34605623 DOI: 10.1021/acsami.1c13581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigate the time-resolved photocurrent response of CdSe quantum dot (QD) thin films sensitized with zinc β-tetraaminophthalocyanine (Zn4APc) (Kumar , ACS Appl. Mater. Interfaces, 2019, 11, 48271-48280) on three different substrates, namely, silicon with 230 nm SiO2 dielectric, glass, and polyimide. While Si/SiO2 (230 nm) is not suitable for any transient photocurrent characterization due to an interfering photocurrent response of the buried silicon, we find that polyimide substrates invoke the larger optical bandwidth with 85 kHz vs 67 kHz for the same quantum dot thin film on glass. Upon evaluation of the transient photocurrent, we find that the photoresponse of the CdSe quantum dot films can be described as a combination of carrier recombination and fast trapping within 2.7 ns followed by slower multiple trapping events. The latter are less pronounced on polyimide, which leads to the higher bandwidth. We show that all devices are resistance-capacitance (RC)-time limited and that improvements of photoresistance are the key to further increasing the bandwidth.
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Affiliation(s)
- Christine Schedel
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Fabian Strauß
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Krishan Kumar
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Andre Maier
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Kai M Wurst
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Patrick Michel
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
| | - Marcus Scheele
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Tübingen 72076, Germany
- Center for Light-Matter Interaction, Sensors and Analytics LISA+, University of Tübingen, Tübingen 72076, Germany
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Kumar K, Hiller J, Bender M, Nosrati S, Liu Q, Edelmann M, Maier S, Rammler T, Wackenhut F, Meixner AJ, Braun K, Bunz UHF, Scheele M. Periodic Fluorescence Variations of CdSe Quantum Dots Coupled to Aryleneethynylenes with Aggregation-Induced Emission. ACS Nano 2021; 15:480-488. [PMID: 33438432 DOI: 10.1021/acsnano.0c05121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
CdSe nanocrystals and aggregates of an aryleneethynylene derivative are assembled into a hybrid thin film with dual fluorescence from both fluorophores. Under continuous excitation, the nanocrystals and the molecules exhibit anticorrelated fluorescence intensity variations, which become periodic at low temperature. We attribute this to a structure-dependent aggregation-induced emission of the aryleneethynylene derivative, which impacts the rate of excitation energy transfer between the molecules and nanocrystals. This work highlights that combining semiconductor nanocrystals with molecular aggregates, which exhibit aggregation-induced emission, can result in emerging optical properties.
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Affiliation(s)
- Krishan Kumar
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Jonas Hiller
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Markus Bender
- Organisch-Chemisches Institut and Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Saeed Nosrati
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Quan Liu
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
- Charles Delaunay Institute, CNRS Light, Nanomaterials, Nanotechnologies (L2n, former "LNIO"), University of Technology of Troyes, 12 rue Marie Curie - CS 42060, 10004 Troyes Cedex, France
| | - Marc Edelmann
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Steffen Maier
- Organisch-Chemisches Institut and Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Tim Rammler
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Frank Wackenhut
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Alfred J Meixner
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
- Center for Light-Matter Interaction, Sensors and Analytics LISA+, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Kai Braun
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut and Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Marcus Scheele
- Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
- Center for Light-Matter Interaction, Sensors and Analytics LISA+, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
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Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Perspektiven gekoppelter organisch‐anorganischer Nanostrukturen für Ladungs‐ und Energietransferanwendungen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.201916402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anja Maria Steiner
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
| | - Franziska Lissel
- Institut Makromolekulare Chemie Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Andreas Fery
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Jannika Lauth
- Leibniz-Universität Hannover Institut für Physikalische Chemie und Elektrochemie Callinstr. 3A 30167 Hannover Deutschland
| | - Marcus Scheele
- Eberhard-Karls-Universität Tübingen Institut für Physikalische und Theoretische Chemie Auf der Morgenstelle 18 72076 Tübingen Deutschland
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Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Prospects of Coupled Organic-Inorganic Nanostructures for Charge and Energy Transfer Applications. Angew Chem Int Ed Engl 2021; 60:1152-1175. [PMID: 32173981 PMCID: PMC7821299 DOI: 10.1002/anie.201916402] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 12/20/2022]
Abstract
We review the field of organic-inorganic nanocomposites with a focus on materials that exhibit a significant degree of electronic coupling across the hybrid interface. These nanocomposites undergo a variety of charge and energy transfer processes, enabling optoelectronic applications in devices which exploit singlet fission, triplet energy harvesting, photon upconversion or hot charge carrier transfer. We discuss the physical chemistry of the most common organic and inorganic components. Based on those we derive synthesis and assembly strategies and design criteria on material and device level with a focus on photovoltaics, spin memories or optical upconverters. We conclude that future research in the field should be directed towards an improved understanding of the binding motif and molecular orientation at the hybrid interface.
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Affiliation(s)
- Anja Maria Steiner
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
| | - Franziska Lissel
- Institute of Macromolecular ChemistryLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Andreas Fery
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Jannika Lauth
- Leibniz Universität HannoverInstitute of Physical Chemistry and ElectrochemistryCallinstr. 3A30167HannoverGermany
| | - Marcus Scheele
- Eberhard Karls-Universität TübingenInstitute of Physical and Theoretical ChemistryAuf der Morgenstelle 1872076TübingenGermany
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