Polyethienimine interface dipole tuning for electron selective contacts
| Autor: | Eloi Ros Costals, Thomas Tom, Gerard Masmitja, Benjamin Pusay, Estefania Almache, Maykel Jimenez, Julia Lopez, Edgardo Saucedo, Pablo Ortega, Joan Bertomeu, Joaquim Puigdollers, Cristobal Voz |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria Electrònica, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. MNT-Solar - Grup de Micro i Nano Tecnologies per Energia Solar |
| Rok vydání: | 2022 |
| Předmět: |
Interface films
Poly(ethylenimine) Silicon Energies::Energia solar fotovoltaica [Àrees temàtiques de la UPC] Polyelectrolites Selective contacts Interface dipole Work study Dipoles Silicon Photovoltaics Dipole antennas Thin layers Conjugated polymers Photovoltaic power generation Polyelectrolytes Conjugated Polyelectrolites Silicon photovoltaic Conjugated polyelectrolite Dipole Energia solar fotovoltaica |
| Zdroj: | 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC). |
| Popis: | © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This work studies the use of thin layers of polyethylenimine (PEI) as an interface film to produce electron selective contacts for photovoltaic applications in crystalline silicon. Generally, in conjugated polyelectrolytes such as PEI with a high Lewis basicity, charge is accumulated along the chain of the polymer and counter anions from the solvent create an intense dipole array. In this work, part of the amine groups in PEI are protonated by the solvent that behaves as a weak Bronsted acid during the process. The PEI band modification is able to eliminate Fermi level pinning at metal/semiconductor junctions as it shifts the work function of the metallic electrode by more than 1 eV. As a consequence, induced charge transport between the metal and the semiconductor forms an electron accumulation region and promotes enhanced selectivity. This research has been supported by Spanish government through Grants PID2019-109215RB-C41 (SCALED), PID2019-109215RB-C43, PID2020-116719RB-C41 (MATER ONE) and PID2020-115719RB-C21 (GETPV) and funded by MCIN/AEI/ 10.13039/501100011033. Besides this the work is also supported by the international Grants SENESCYT-2018 funded by Ecuadorian government. |
| Databáze: | OpenAIRE |
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