Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes

@article{citeulike:587520, abstract = {We demonstrate a method for efficient photon harvesting in organic thin films, thereby increasing the efficiency of organic photovoltaic cells. By incorporating an exciton-blocking layer (EBL) inserted between the photoactive organic layers and the metal cathode, we achieved an external power conversion efficiency of 2.4\%\&\#177;0.3\% in vacuum-deposited ultrathin organic bilayer photovoltaic (PV) cells employed in a simple light trapping geometry. Ultrathin (\~{}100 \Å) cells incorporating the transparent, conductive EBL have an internal quantum efficiency as high as 33\%\&\#177;4\% over a spectral region matched to the solar spectrum. The very thin organic layers have a low series resistance, allowing for efficient power conversion in organic PV cells under intense (\>15 suns) AM1.5 illumination. This device structure demonstrates that control of exciton diffusion in solid-state organic devices leads to a significant increase in the photon-to-carrier conversion efficiency. \©2000 American Institute of Physics.}, author = {Peumans, P. and Bulovic, V. and Forrest, S. R. }, citeulike-article-id = {587520}, comment = {pdf}, doi = {http://dx.doi.org/10.1063/1.126433}, journal = {Applied Physics Letters}, keywords = {bcp, cupc, photovoltaic}, number = {19}, pages = {2650--2652}, posted-at = {2006-04-15 11:59:52}, priority = {2}, publisher = {AIP}, title = {Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes}, url = {http://dx.doi.org/10.1063/1.126433}, volume = {76}, year = {2000} }

TY - JOUR ID - citeulike:587520 L3 - citeulike-article-id:587520 TI - Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes JF - Applied Physics Letters VL - 76 IS - 19 SP - 2650 EP - 2652 PB - AIP N2 - We demonstrate a method for efficient photon harvesting in organic thin films, thereby increasing the efficiency of organic photovoltaic cells. By incorporating an exciton-blocking layer (EBL) inserted between the photoactive organic layers and the metal cathode, we achieved an external power conversion efficiency of 2.4%±0.3% in vacuum-deposited ultrathin organic bilayer photovoltaic (PV) cells employed in a simple light trapping geometry. Ultrathin (~100 Å) cells incorporating the transparent, conductive EBL have an internal quantum efficiency as high as 33%±4% over a spectral region matched to the solar spectrum. The very thin organic layers have a low series resistance, allowing for efficient power conversion in organic PV cells under intense (>15 suns) AM1.5 illumination. This device structure demonstrates that control of exciton diffusion in solid-state organic devices leads to a significant increase in the photon-to-carrier conversion efficiency. ©2000 American Institute of Physics. KW - bcp KW - cupc KW - photovoltaic N1 - pdf AU - Peumans, P AU - Bulovic, V AU - Forrest, SR PY - 2000/// UR - http://dx.doi.org/10.1063/1.126433 ER -