SEMINAIRE LMGP - 26.05.2023 - Pia VASQUEZ RIVERA

Pia VASQUEZ RIVERA

Pia VASQUEZ RIVERA

PhD student
Univ. Grenoble Alpes, IMEP², Campus INES - LMGP

Abstract

Energy production by means of photovoltaic (PV) devices is nowadays a part of our daily life. By 2022, the total installed capacity of photovoltaic systems exceeded 200 GW[1], supporting the energetic transition to low-carbon schemes. Nevertheless, the increasing needs of electricity supply demand for breaking current device performances. Monolithically integrated Perovskite (PK) / Silicon heterojunction (SHJ) tandem solar cells are an emerging PV application, which joins the robustness of the SHJ with the promising properties of PK to exceed single junction theoretical conversion limits[2]. By 2023, record performances over 30% were achieved by several laboratories[3]. However, integration of such devices requires fine-tuning of each sub-cell, and at the connection between them, namely the recombination junction[4] (RJ). Here, charge carriers generated in each sub-cell need to be efficiently extracted and recombined in order to avoid device losses. In general, a compromise between optical and structural properties, charge carriers transport and process compatibility between subsequently deposited layers is needed. In this thesis, interaction between materials composing the RJ of p-i-n PK/SHJ tandems are explored, in order to investigate both their impact on the SHJ bottom cell substrate and their role on the deposition of the PK top cell.