Speaker | Enrico Della Gaspera |
Affiliation | School of Science, RMIT University, Melbourne |
Date | 2022-11-28 |
Time | 12:00 |
Venue | ONSITE: S3 Seminar Room (III floor) – Phys. Dept. and
ONLINE: https://tinyurl.com/dellagaspera |
Host | Arrigo Calzolari |
Solution processing is an accessible and versatile approach for synthesizing structurally and chemically controlled nanomaterials. The ability to control the purity, surface chemistry, and microstructure of solution-processed nanomaterials using tailored reaction chemistry and processing conditions will enable to move away from vacuum-based processes. This will reduce the cost and improve the scalability of nanomaterials and related devices, therefore meeting the increasing demand for cheaper consumer electronics. In this talk, I will present an overview of solution-based approaches my group has developed over the past few years to synthesize semiconducting nanostructures for applications in optoelectronics.
First, I will focus on colloidal syntheses for semiconducting nanocrystals, using plasmonic (doped) ZnO as a case study to elucidate various synthesis approaches, doping strategies, scalability, and the fabrication of nanocrystal-based thin films. The distinctive optical and electrical properties of these doped colloids will be harnessed through the fabrication of infrared absorbers, transparent electrodes and plasmonic gas sensors.
Then I will present the synthesis of nanostructured thin films via decomposition of suitable precursors directly on the desired substrate. I will discuss the advantages of chemical bath deposition in the fabrication of high-quality inorganic coatings at low temperatures (<80 °C) with excellent control on their optoelectronic properties, enabling applications within solar cells and light emitting devices. Next, I will discuss the versatility of ultrasonic spray pyrolysis, presenting a comprehensive overview of SnO2-based films as a model system, and then focussing on novel coatings such as CuCrO2, demonstrating the synthesis of transparent conductors able to compete with commercially available products. Finally, I will present some recent results on the synthesis of nanostructured BiVO4 coatings via SILAR (successive ionic layer absorption and reaction) for application in photoelectrochemical water splitting, and of bismuth chalcohalide (BiOI, BiSI) thin films for high performance photodetectors.
Istituto Nanoscienze
Consiglio Nazionale delle Ricerche
PEC: protocollo.nano@pec.cnr.it
Partita IVA 02118311006
Piazza San Silvestro 12
56127 Pisa, Italy
phone +39 050 509418
fax +39 050 509550
Istituto Nanoscienze Consiglio Nazionale delle Ricerche
Piazza San Silvestro 12, I
56127 Pisa
phone +39 050 509525/418
fax +39 050 509550
via Campi 213/A, I
41125 Modena 7
phone +39 059 2055629
fax +39 059 2055651″
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