Projects / Programmes source: ARIS

Photoelectrochromic System and Photovoltaically Self-charging Battery (PES&PVSCB)

Research activity

Code Science Field Subfield
2.03.03  Engineering sciences and technologies  Energy engineering  Renewable resources and technologies 

Code Science Field
T152  Technological sciences  Composite materials 
T140  Technological sciences  Energy research 
P352  Natural sciences and mathematics  Surface and boundary layery chemistry 
P401  Natural sciences and mathematics  Electrochemistry 
dye sensitised solar cells, photoelectrochromic system, photovoltaically self-charging battery, nanocrytalline transition metal oxide layers, sol-gel synthesis
Evaluation (rules)
source: COBISS
Researchers (3)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  15463  PhD Urša Opara Krašovec  Electronic components and technologies  Head  2002 - 2004  264 
2.  17271  Helena Spreizer    Researcher  2002 - 2004  35 
3.  14121  PhD Angelja Kjara Surca  Chemistry  Researcher  2002 - 2004  401 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0104  National Institute of Chemistry  Ljubljana  5051592000  20,916 
2.  1538  University of Ljubljana, Faculty of Electrical Engineering  Ljubljana  1626965  27,738 
The PES&PVSCB project concerns development of nanoporous – nanocrystalline transition metal oxides for two innovative systems: Photoelectrochromic System (PES) and Photovoltaically Self-Charging Battery (PVSCB). PES is a new type of switchable window, while PVSCB unifies in one unit a solar cell and a battery. The operation of both systems base on solar (renewable) energy. The layer structure of both systems is the same except that in PVSCB thicker layers are used. The main object of this project will be the optimisation of the WO3 and TiO2 layers and the development of new nanoporous nanocrystalline transition metal oxide layers for these new systems. Nanocrystalline porous tungsten oxide, titanium oxide and other transition metal oxide layers will be developed using sol-gel processing, i.e. by making molecular scale composite layers using an organically modified silane as a host for transition metal precursors. During heat-treatment (> 350°C) the layers, the organic part burns out leaving pores, while SiO2-network present in the hybrid layer act as a skeleton. The structural, electrical and optical properties of the materials will be characterised. Assembling and testing the layers in the PES and PVSCB will provide answers to which type of layer is the most suitable. To achieve stable systems recently developed solid electrolyte will be used. The result of the project shall be a solid PES with solar transmittance changes between 50 and 5% with a short switching time (<10 minutes), and a solid PVSCB where more than 1 C/cm2 charge could be stored under illumination of 1 sun (1000 W/m2).
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