{ "meta": { "api_type": "NWO Projects API", "version": "1.0.2", "licence": { "name": "CC0 1.0 Universal", "url": "https://creativecommons.org/publicdomain/zero/1.0", "description": "To the extent possible under law, all copyright and related or neighbouring rights have been waived worldwide to the data made available through this API." }, "documentation": "https://doi.org/10.5281/zenodo.14918287", "release_date": "2025-08-20T00:00:00", "funder": "https://doi.org/10.13039/501100003246", "ror_id": "https://ror.org/04jsz6e67", "date": "2026-11-05T00:00:00", "count": 1, "per_page": 100, "pages": 1, "page": 1 }, "projects": [ { "project_id": "700.59.405", "title": "Unidirectional energy transfer and charge separation in structured quantum-dot solids", "funding_scheme_id": 402, "funding_scheme": "NWO-Talentprogramma Veni 2009 CW", "department": "Exacte en Natuurwetenschappen", "sub_department": "Chemische Wetenschappen", "start_date": "2009-10-01T00:00:00", "end_date": "2013-03-21T00:00:00", "reporting_year": 2009, "summary_nl": "The aim of this proposal is to control and understand efficient charge separation in structured 3D assemblies, based on colloidal quantum-dots. One way to achieve this is by controlling the size of the quantum dots in space, creating size gradients that can drive various fluxes. A second approach is to control the interface between different types of nanocrystals.\nColloidal quantum dots (QDs) are fascinating materials whose optical and electrical properties are unusual and depend on their size. While interesting themselves, and studied extensively in solution, successful application will invariably involve assembling them into some kind of solid. Doing so randomly would be an opportunity missed: this proposal argues that structuring the solid can really bring the quantum dots to life.\nStructuring of QD solids can add highly desirable functionalities. A suitable size gradient can lead to enhanced and unidirectional energy transfer, which competes with undesired processes such as charge trapping and multi-exciton annihilation. The objective is to make the desired energy transfer so fast, by tinkering with the assembly, that it becomes the dominant process. Success in this proposed research will guide the efficient sensitization of metal-oxide based solar cells. Harvesting of multiple charges generated by Carrier Multiplication will be a milestone.\nAn alternating sequence of suitable nanoparticles, in which one acts as an electron donor and the other as electron acceptor, will upon photoexcitation result in charge transfer between the different particles followed by charge transport between particles of the same kind. This is a promising concept for a cheap, efficient all-inorganic solar cell.\nThe structured assemblies will be made by parallel approaches using state-of-the-art layer-by-layer deposition and a more promising new experimental method based on size-exclusion chromatography. Energy and charge transfer will be studied quantitatively using ultrafast spectroscopy.\n", "summary_en": "The aim of this proposal is to control and understand efficient charge separation in structured 3D assemblies, based on colloidal quantum-dots. One way to achieve this is by controlling the size of the quantum dots in space, creating size gradients that can drive various fluxes. A second approach is to control the interface between different types of nanocrystals.\nColloidal quantum dots (QDs) are fascinating materials whose optical and electrical properties are unusual and depend on their size. While interesting themselves, and studied extensively in solution, successful application will invariably involve assembling them into some kind of solid. Doing so randomly would be an opportunity missed: this proposal argues that structuring the solid can really bring the quantum dots to life.\nStructuring of QD solids can add highly desirable functionalities. A suitable size gradient can lead to enhanced and unidirectional energy transfer, which competes with undesired processes such as charge trapping and multi-exciton annihilation. The objective is to make the desired energy transfer so fast, by tinkering with the assembly, that it becomes the dominant process. Success in this proposed research will guide the efficient sensitization of metal-oxide based solar cells. Harvesting of multiple charges generated by Carrier Multiplication will be a milestone.\nAn alternating sequence of suitable nanoparticles, in which one acts as an electron donor and the other as electron acceptor, will upon photoexcitation result in charge transfer between the different particles followed by charge transport between particles of the same kind. This is a promising concept for a cheap, efficient all-inorganic solar cell.\nThe structured assemblies will be made by parallel approaches using state-of-the-art layer-by-layer deposition and a more promising new experimental method based on size-exclusion chromatography. Energy and charge transfer will be studied quantitatively using ultrafast spectroscopy.\n", "project_members": [ { "role": "Project leader", "member_id": 156277, "last_name": "Houtepen", "degree_pre_nominal": "prof. dr.", "initials": "A.J.", "first_name": "Arjan", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||Chemical Engineering||Opto-Electronic Materials Section", "organisation_id": 81425, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Researcher", "member_id": 156277, "last_name": "Houtepen", "degree_pre_nominal": "prof. dr.", "initials": "A.J.", "first_name": "Arjan", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||Chemical Engineering||Opto-Electronic Materials Section", "organisation_id": 81425, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Main Applicant", "member_id": 156277, "last_name": "Houtepen", "degree_pre_nominal": "prof. dr.", "initials": "A.J.", "first_name": "Arjan", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||Chemical Engineering||Opto-Electronic Materials Section", "organisation_id": 81425, "ror": "https://ror.org/02e2c7k09", "active": true } ], "products": [ { "title": "Supercrystals of CdSe quantum dots with high charge mobility and efficient electron transfer to TiO2", "year": 2010, "edition": "4", "start": 1723, "end": 1731, "type": "Wetenschappelijk artikel", "journal_title": "ACS Nano", "authors": [ { "last_name": "Houtepen", "initials": "A.J.", "first_name": "Arjan", "role": "Auteur", "index_number": 0 }, { "last_name": "Talgorn", "initials": "E.C.V.", "first_name": "Elise", "role": "Auteur", "index_number": 0 }, { "last_name": "Goossens", "initials": "A.P.L.M.", "role": "Auteur", "index_number": 0 }, { "last_name": "Piris", "initials": "J.", "role": "Auteur", "index_number": 0 }, { "last_name": "Siebbeles", "initials": "L.D.A.", "role": "Auteur", "index_number": 0 }, { 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3441, "end": 3447, "type": "Wetenschappelijk artikel", "journal_title": "Journal of Physical Chemistry C", "authors": [ { "last_name": "Houtepen", "initials": "A.J.", "first_name": "Arjan", "role": "Auteur", "index_number": 0 }, { "last_name": "Goossens", "initials": "A.P.L.M.", "role": "Auteur", "index_number": 0 }, { "last_name": "Moysidou", "initials": "E.", "role": "Auteur", "index_number": 0 }, { "last_name": "Talgorn", "initials": "E.C.V.", "role": "Auteur", "index_number": 0 }, { "last_name": "Siebbeles", "initials": "L.D.A.", "role": "Auteur", "index_number": 0 }, { "last_name": "Abellon", "initials": "R.", "role": "Auteur", "index_number": 0 }, { "last_name": "Savenije", "initials": "T.J.", "role": "Auteur", "index_number": 0 } ] }, { "title": "Efficient photogeneration of charge carriers in silicon nanowires with a radial doping gradient", "year": 2011, "edition": "22", "start": 315710, "end": 315715, "type": "Wetenschappelijk artikel", "journal_title": "Nanotechnology", 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artikel", "url_open_access": "http://www.nature.com/ncomms/2013/130913/ncomms3329/pdf/ncomms3329.pdf", "journal_title": "Nature communications", "authors": [ { "last_name": "Gao", "initials": "Y.", "first_name": "Yunan", "role": "Auteur", "index_number": 1 }, { "last_name": "Suchand Sandeep", "initials": "C.S.", "role": "Auteur", "index_number": 2 }, { "last_name": "Schins", "initials": "J.M.", "role": "Auteur", "index_number": 3 }, { "last_name": "Houtepen", "initials": "A.J.", "role": "Auteur", "index_number": 4 }, { "last_name": "Siebbeles", "initials": "L.D.A.", "role": "Auteur", "index_number": 5 } ] }, { "title": "Enhanced Hot-Carrier Cooling and Ultrafast Spectral Diffusion in Strongly Coupled PbSe Quantum-Dot Solids", "year": 2011, "edition": "11", "start": 5471, "end": 5476, "type": "Wetenschappelijk artikel", "journal_title": "Nano Lett", "authors": [ { "last_name": "Talgorn", "initials": "E.", "role": "Auteur", "index_number": 0 }, { "last_name": "Schins", "initials": 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