Agreement No: 1.1.1.1/20/A/060

Type: European Regional Development Fund (ERDF)

Duration: 01.04.2021 - 30.09.2023.

Project Leader: Institute of Solid State Physics University of Latvia (ISSP UL), Dr.phys. Aleksejs Kuzmins.

Project partner: SIA LESLA LATVIA, Dr. Leslie Robert Adrian.

Total budget: 539 594.38 EUR

ISSP UL budget: 309 397.25 EUR

Project description:

Functional ink-jet printing is a promising new technology, cheap and environmentally friendly, and creates a new paradigm in digital manufacturing where electronic devices and circuits can be printed on demand.

The main goal of this project is a development and demonstration of the ink-jet technology that will be able to print wearable and flexible functional electronic devices, including the inductive antenna, capable of capturing electrical energy in the kilohertz range and feeding printed electroluminescent light-emitting devices implemented as 2D drawings.

The main result of the project is the development of the ink-jet printed prototype of a light-emitting device coupled with a wireless energy-receiving antenna.

The proposed Industrial research project is implemented by the Institute of Solid State Physics, University of Latvia (ISSP UL) and LESLA LATVIA company. This interdisciplinary project consists of the research activities in Physical (1.3) and Chemical (1.4) sciences, Electrical engineering, electronics, information and communication technologies (2.2), Materials science (2.5) and Nanotechnology (2.10), according to the OECD Frascati Manual.

The total cost of the project is 539594.38 EUR (57.3% LU CFI and 42.7% LESLA LATVIA) ERDF contribution, with the public investment of 499124.80 EUR (92.5%).


ON THE IMPLEMENTATION OF THE PROJECT (PERIOD 14.03.2022-27.06.2022)

27.06.2022.

The synthesis of nanomaterials for ink-jet printing technology for the production of flexible/stretchable electronic components was continued within the ERDF project No. 1.1.1.1/20/A/060 (Activities 1, 2, 3, and 4).

During the reporting period, the synthesis of conductive, semiconducting (luminescent) and isolating inks was performed.

Highly luminescent CsPbBr3, CsPbCl3 and CuInS2 toluene-based inks with PMMA polymer were successfully synthesized to form an ACEL device. Production of the ACEL power supply began.

Ag, Au and ITO nanoparticles were synthesized. These nanoparticles have a pronounced surface plasmon resonance and may have pronounced nonlinear optical phenomena.

Tests with an inkjet printer using PEDOT and CuInS2 were continued.

The first paper on the project results was published in the journal Physica Status Solidi (b) (doi: 10.1002/pssb.202200001).


ON THE IMPLEMENTATION OF THE PROJECT (PERIOD 14.12.2021-13.03.2022.)

14.03.2022.

The synthesis of nanomaterials for ink-jet printing technology for the production of flexible/stretchable electronic components was continued within the ERDF project No. 1.1.1.1/20/A/060 (Activities 1, 2 and 4).

During the reporting period, the synthesis of conductive, semiconducting (luminescent) and isolating inks was performed.

ZnS:Mn luminescent nanoparticles were developed and synthesized. Structure and optical properties of synthesized ZnS:Mn nanoparticles were chracterized.

Work on silver and copper nanoparticles continued. Tests have shown the high conductivity of electrical pathways made of both nanoparticles.

First tests with the inkjet printer were performed.

The first paper on the project results was accepted for publication in Physica Status Solidi (b) (doi: 10.1002/pssb.202200001).


ON THE IMPLEMENTATION OF THE PROJECT (PERIOD 01.10.2021.-13.12.2021.)

13.12.2021.

The synthesis of nanomaterials for ink-jet printing technology for the production of flexible/stretchable electronic components was continued within the ERDF project No. 1.1.1.1/20/A/060 (Activity 1).

During the period, the synthesis of materials for conductive and semiconducting (luminescent) inks was performed.

CsPbBr3 and CsPbI3 luminescent nanoparticles (quantum dots) with high luminescence quantum yield were developed and synthesized. Synthesized CsPbBr3 and CsPbI3 nanocrystals have strong photoluminescence in the green or red spectral range.

Work was continued on the silver nanoparticles. The first tests demonstrated high conductivity of electrical paths made of our silver nanoparticles.

Studies were also performed to improve the electrical conductivity of the organic polymer PEDOT:PSS-based ink by the addition of polyethylene oxide (PEO).


ON THE IMPLEMENTATION OF THE PROJECT (PERIOD 01.07.2021.-30.09.2021.)

08.10.2021.

The synthesis of nanomaterials for ink-jet printing technology for the production of flexible/stretchable electronic components was continued within the ERDF project No. 1.1.1.1/20/A/060 (Activity 1).

During the period, a synthesis of conductive and semiconductive inks has been performed.

Silver nanoparticles with different morphologies (spherical and prismatic) have been synthesized for use in conductive inks for electrode printing.  

ZnO nanoparticles with n-type conductivity have been synthesized for use in the p-n junctions.  2D layered SnS2 nanoplates with gold-yellow color have been also synthesized for use as n-type semiconducting inks.


ON THE IMPLEMENTATION OF THE PROJECT (PERIOD 01.04.2021.-30.06.2021.)

15.07.2021.

The synthesis of nanomaterials for ink-jet printing technology for the production of flexible/stretchable electronic components was launched within the ERDF project No. 1.1.1.1/20/A/060 (Activity 1).

During the period, a series of highly luminescent CuInS2/ZnS quantum dots having a core/shell structure and tunable photoluminescence wavelength and band-gap energies were fabricated. Zinc-copper-indium sulfide quantum dots are a low-toxic I-III-VI family of semiconductors due to their wide and color-adjustable photoluminescence. Synthesized core/shell CuInS2/ZnS nanocrystals have strong photoluminescence in the 550-800 nm range with a relatively high fluorescence quantum yield.

Started synthesis and conductive ink formulation based on Ag nanoparticles. Additionally, studied scientific articles describing synthesis protocols of layered SnS2 nanoplates.