Regensburg 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Hybrid and Perovskite Photovoltaics II

CPP 19.6: Vortrag

Dienstag, 2. April 2019, 10:45–11:00, H18

Methylammonium Lead Iodide Perovskite Solar Cells from direct Co-Evaporation — •Marcel Roß, Lidón Gil Escrig, Amran Al-Ashouri, Marko Jošt, and Steve Albrecht — Helmholtz-Zentrum Berlin, Young Investigator Group for Perovskite Tandem Solar Cells

Deposition of perovskite solar cell absorbers by co-evaporation offers a variety of advantages over solution based preparation such as homogeneous coating of large substrates and conformal coverage of textured substrates. Up to date the gas-like evaporation behavior of organic precursors such as methylammonium halides makes the rate measurement and consequently the process control difficult as volatile species might re-evaporate from chamber walls. To overcome these challenge we implement an evaporation setup with a thermal management system to directly co-evaporate volatile precursors for perovskites. Through a combination of actively cooled and heated surfaces, a direct and controlled evaporation process is achieved. This way, high quality Methylammonium Lead Iodide perovskite films are obtained as confirmed by XRD, PL and optical measurements. These perovskite films are implemented into p-i-n solar cells utilizing different hole transport materials (HTMs) such as PTAA, self-assembling monolayer (SAM) molecules and Spiro-TTB. Although the coarse grain morphology measured by SEM is very comparable, the solar cell performance is strongly affected by the used HTM and stabilized efficiency over 20% are realized with the SAMs only. The herein achieved efficiency is comparable to the highest reported value for evaporated perovskite solar cells.