Abstract

A film of single-walled carbon nanotubes (SWNTs) can be flexible and stretchable transparent-conductive layer. At the same time, this film can be carrier-selective layers, i.e., electron-blocking-layers or hole-blocking-layers, by using adequate doping. We have demonstrated efficient SWNT/Si solar cells [1,2] and organic solar cells [3,4] using dry-deposited high-quality SWNTs and honeycomb-structured SWNTs. For organic solar cells, the SWNT doped by MoOx and PEDOT:PSS demonstrated a dual function, which can replace both ITO and electron-blocking-layer [3]. Using this advantage of the SWNT film, flexible organic solar cells were fabricated with ease [3]. Also, it was possible to replace electron-blocking-layer and metal electrode for inverted-type organic solar cells [4]. The removal of metal electrode enabled flexible, the semi-transparent window-like solar cells, which was inexpensive in their production process [4]. Here we have extended the application of CNT films for organic-inorganic Perovskite solar cells.

© 2017 Japan Society of Applied Physics, Optical Society of America