Synthesis of a Hole Transporting Material for perovskite solar cells
Impressive improvements were done on Perovskite Solar Cells (PSCs) the last few years, achieving 25.7%, making them very competitive compared to other inorganic technologies. However, the stability of PSCs still needs to be addressed for industrial production Development of interfacial layers (for Electron Transport and Hole Transport) is a key parameter. Salts used as dopants for Hole Transporting Materials (HTMs) are highly hygroscopic, favouring the degradation of the Perovskite layer. To overcome this issue new 'low dopant' or 'dopant-free' conductive HTMs, with passivation properties towards the active layer to reduce the degradation induced by light and extrinsic factors can be proposed. Carbazole/phenothiazine based small molecules demonstrated favourable structural and energetical features for application in PSCs. Access the VIPERLAB infrastructure will be an opportunity to take benefit of synthetic skills on these scaffolds to prepare and characterize a new molecule HTM.
Status: Ongoing
Date of proposal: 30/05/2022
Start date: 11/07/2022
End Date: 15/07/2022
Used Instruments: 1H NMR for structural characterization. UV spectrometry and fluorescence spectroscopy for optical characterization. Cyclic voltametry for electrochemical analysis.
Experimental Technique: Synthesis and characterization of a small molecule hole transporting material for perovskite solar cells.
Experiment Description: The experiment involved the synthesis and characterization of the molecule 10-hexyl-37-bis(4455-tetramethyl-132-dioxaborolan-2-yl)-10H-phenothiazine as a hole transporting material (HTM) for perovskite solar cells. The project was executed at UniversitÓ degli Studi di Torino CHOSE@UNITO, under the guidance of Dr. Christine Dagron and affiliated with UniversitÚ de Pau et des Pays de lAdour IPREM.
Type Samples: Synthesized small molecule HTM: 10-hexyl-37-bis(4455-tetramethyl-132-dioxaborolan-2-yl)-10H-phenothiazine
Sample Description: The molecule was synthesized starting from phenothiazine, undergoing several chemical reactions including alkylation, bromination, Miyaura borylation, and finally coupling with 3-bromo-N-hexylcarbazole.
Experiment Data Type: Structural characterization data (1H NMR). Optical characterization data (UV absorption and emission spectra). Electrochemical analysis data (cyclic voltametry for HOMO and LUMO energy levels).
Characterization Technics: NMR spectroscopy for structural analysis. UV spectrometry and fluorescence for optical properties. Cyclic voltametry for electrochemical properties.
Characterization Data Type: NMR spectra for molecular structure confirmation. UV absorbance and emission data. Electrochemical data including HOMO and LUMO energy levels.
Analyzed Data: Synthesis route and purity of the HTM. Optical properties relevant for solar cell applications. Electrochemical properties, including HOMO-LUMO levels.
Main Targets Project: Synthesis of a new HTM for perovskite solar cells. Detailed characterization of the HTM to assess its suitability for solar cell applications.
Main Achievements Findings: Successful synthesis and purification of the HTM. Determination of structural, optical, and electrochemical properties. Confirmation of the HTM's suitability for use in perovskite solar cells, with the potential for future scale-up and efficiency testing.
Review 11
How would you describe your experience with the VIPERLAB opportunity? How did the experience/visit at UNITOV_CHOSE-MATERIALS meet your expectations?
The experience was very good. I had very good interactions with people at UNITO allowing to achieve the goals of the project.
Did you face any difficulties during your visit or application process?
No, everything was clear and smooth
Does this VIPERLAB experience at UNITOV_CHOSE-MATERIALS bring you closer to your research objectives? How?
It gave us the opportunity to take benefit of the expertise of UNITO to synthesis a new hole transporting material. It helped us to save time.
What other VIPERLAB activities have you participated in, or would you like to participate in?
For the moment I have not participated to other activities. But, why not in the future.
Do you intend or already did publish/present your collected results in a paper or conference?
I intend to use the results obtained during the Viperlab project to publications and oral presentations. Of course, the Viperlab financial support will be indicated.