This book includes a plain text version that is designed for high accessibility. To use this version please follow this link.
8


nanotimes Research


Solar Cells I // Organic Solar Cell Architecture Sets New Performance Level


T


he Belgian research centre imec, together with Plextronics and Solvay (SOLB.BE), presented at


the European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) in Hamburg, Germany, an organic polymer-based single junction solar cell with 6.9% performance in an innovative inverted device stack. Combining imec‘s scalable inverted device architecture and Plextronics‘ polymers, new levels of cell efficiency were achieved. The polymer was also integrated into a module resulting in excel- lent module level efficiencies of 5% for an aperture area of 25cm².


The dedicated inverted bulk heterojunction archi- tecture developed by imec improved the device performance by at least 0.5% over standard architec- tures used for organic solar cells. In the active layer, a new buffer layer was introduced to optimize the light management in the device. Imec’s innovative device architecture, combined with Plextronics’ low band-gap p-type polymer with a fullerene derivate, resulted in a stabilized certified conversion efficiency of 6.9%, which is the highest performance obtained for this polymer material and, to our knowledge, the highest efficiency reported for inverted architectures. In this new inverted device architecture, similar per- formance boosts have also been achieved for other polymer materials. The module level efficiencies confirm the suitability towards upscaling.


Tom Aernouts, R&D Team Leader Organic Photo- voltaics at imec: “We are delighted to present these excellent results, achieved by combining imec’s ex- pertise and knowhow in organic photovoltaics R&D with Plextronics’ innovative material. With further optimizations to the material as well as to the archi- tecture, for example by introducing a multi-junction featuring different layers of different polymers each capturing another part of the light spectrum, we en- vision organic solar cell lifetimes of over 10 years and conversion efficiencies of 10% in two to three years, ultimately aiming at industry-relevant solutions.”


http://www.plextronics.com http://www.solvay.com http://www.imec.be


Cover-Image: Organic solar cell modules, composed of 10 devices in monolithic series connection. The solar cells are spincoated and processed on a glass substrate. Possible applications are PV-integrated window panes. © imec


Right: Organic solar cells with spraycoated active layer (P3HT:PCBM), on glass substrate. Imec optimizes the spraycoating technique to make it an industry-viable cost- effective alternative for spincoating. © imec


11-08 :: August 2011


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103