We demonstrate series-connected tandem photovoltaic cells consisting of hydrogenated amorphous silicon (a-Si:H) solar cells and polymer-based organic photovoltaic (OPV) cells. One of the limiting factors of a-Si:H solar cells is their narrow absorption spectrum as compared with that of crystalline silicon solar cells. In order to overcome this limitation, we fabricated a hybrid tandem solar cell by employing a solution-processed OPV subcell based on a low bandgap semiconducting polymer onto the a-Si:H subcell. It was found that the interfacial property of the hole transporting intermediate layer between the subcells strongly affects the photovoltaic property of the tandem cells. By using MoO 3 as an efficient hole transporting intermediate layer instead of the conventional conducting polymer, we obtained the power conversion efficiency of 1.84% and the open-circuit voltage (V OC) of 1.50 V which corresponds closely to the sum of the V OCs of the subcells.
|Title of host publication
|Novel Fabrication Methods for Electronic Devices
|Number of pages
|Published - 2011
|2010 MRS Fall Meeting - Boston, MA, United States
Duration: 29 Nov 2010 → 3 Dec 2010
|Materials Research Society Symposium Proceedings
|2010 MRS Fall Meeting
|29/11/10 → 3/12/10
Bibliographical noteFunding Information:
This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (2009-0081500) and by KRCF (Korea Research Council of Fundamental Science & Technology) and KIST (Korea Institute of Science & Technology) for 'NAP (National Agenda Project) program'.