Self-assembled organic molecule modified electron-selective contacts for silicon heterojunction solar cells

Duman E. S., Kohlstädt M., Reichel C., Tutsch L., Bivour M., Hermle M.

12th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2022, Hybrid, Konstanz, Almanya, 28 - 30 Mart 2022, cilt.2826, (Tam Metin Bildiri) identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 2826
  • Doi Numarası: 10.1063/5.0143044
  • Basıldığı Şehir: Hybrid, Konstanz
  • Basıldığı Ülke: Almanya
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

In this work, we present cost-effective, solution-processed, self-assembled organic materials for enhanced charge carrier selectivity for crystalline silicon (c-Si) heterojunction (SHJ) solar cells. Charge transport properties of two different phosphonic acid-based self-assembled molecules, 1H,1H,2H,2H-Perfluorooctanephosphonic acid (FOPA) and [2-(9H- Carbazol-9-yl)ethyl]phosphonic acid (2PACz), are investigated. Interface barrier height modification is achieved by utilizing FOPA and 2PACz between c-Si and the metal electrode at electron-selective contacts. These molecules are applied as dopant-free electron-selective contact in SHJ solar cells. Moreover, the thermal stabilities of organic layers are investigated. A promising efficiency of 16.5%, which is stable upon annealing at 200 °C is achieved for SHJ solar cell with FOPA electron-selective contact.