Title :
Application of graphene in tandem organic solar cells
Author :
Tong, Shi Wun ; Wang, Yu ; Ng, Man-Fai ; Loh, Kian Ping
Author_Institution :
Dept. of Chem., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
A highly conductive and transparent graphene film is deployed as an efficient intermediate layer (IML) in tandem organic photovoltaic cells. Tandem cells utilizing transition metal oxide modified graphene IML demonstrate a high open circuit voltage (Voc) of 1.13 V in series connection. The value of Voc from tandem cell is very close to the sum of Voc attained from two individual subcells (0.58 V) that confirms the perfect ohmic contact at the photoactive layer/graphene interface. The UPS result showed the work function of graphene can be increased effectively to ensure good charge collection with different thickness of MoO3 layer.
Keywords :
graphene; ohmic contacts; photovoltaic cells; solar cells; thin films; work function; C; efficient intermediate layer; graphene interface; high open circuit voltage; highly conductive graphene film; highly transparent graphene film; ohmic contact; photoactive layer; series connection; tandem organic photovoltaic cells; tandem organic solar cells; transition metal oxide; two individual subcells; work function; Artificial intelligence; Indium tin oxide; Photovoltaic cells;
Conference_Titel :
Nanotechnology Materials and Devices Conference (NMDC), 2011 IEEE
Conference_Location :
Jeju
Print_ISBN :
978-1-4577-2139-7
DOI :
10.1109/NMDC.2011.6155323
