Title :
Mechanically stacked and monolithically integrated perovskite/silicon tandems and the challenges for high efficiency
Author :
Colin D. Bailie;Jonathan P. Mailoa;Eric C. Johlin;William H. Nguyen;Eric T. Hoke;Austin J. Akey;Tonio Buonassisi;Michael D. McGehee
Author_Institution :
Stanford University, CA 94305, USA
fDate :
6/1/2015 12:00:00 AM
Abstract :
With the advent of high-bandgap perovskites, the opportunity now exists to make tandems with perovskites on top of silicon. We have prototyped a mechanically stacked tandem, achieving 17.9% certified efficiency using a perovskite cell with a silver nanowire mesh electrode. We have also prototyped a monolithically integrated tandem on silicon, with the two subcells electronically connected by band-to-band tunneling in the silicon. The primary challenges to propelling perovskite/silicon tandems into a high-efficiency (>25%) regime are spiro-OMeTAD parasitic absorption, perovskite crystal quality, stability of a perovskite with a 1.8 eV bandgap, perovskite environmental stability, and transparent electrode quality and stability.
Keywords :
"Silicon","Photovoltaic cells","Computer architecture","Microprocessors","Silver","Photonic band gap","Electrodes"
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd
DOI :
10.1109/PVSC.2015.7355674