Silver can be used as the back contact and reflector in thin film silicon solar cells. When deposited on textured substrates, silver films often exhibit reduced reflectance due to absorption losses by the excitation of surface plasmon resonances. We show that thermal annealing of the silver back reflector increases its reflectance drastically. The process is performed at low temperature (150°C) to allow the use of plastic sheets such as polyethylene naphthalate and increases the efficiency of single junction amorphous solar cells dramatically. We present the best result obtained on a flexible substrate: a cell with 9.9% initial efficiency and 15.82 mA/cm2 in short circuit current is realized in n-i-p configuration. © 2011 Materials Research Society.
|Journal||Materials Research Society Symposium Proceedings|
|Publication status||Published - 2011|
|Event||2011 MRS Spring Meeting - San Francisco, California, USA|
Duration: 1 Jan 2011 → …
|Conference||2011 MRS Spring Meeting|
|City||San Francisco, California, USA|
|Period||01/01/2011 → …|