Electroluminescence in polymer-fullerene photovoltaic cells

@article{citeulike:587523, abstract = {We report electroluminescence (EL) in photovoltaic (PV) cells based on semiconducting polymer-fullerene composites. By applying a forward bias to the PV cells, the devices exhibited a clear EL action with a peak around 1.5 eV. We ascribe this peak to an \"electric field-assisted exciplex\" formed between the electrons in the fullerenes and the holes in the polymers, thereby resulting in radiative recombination in the composites. This finding is totally unexpected because of a strong photoluminescence quenching in the same materials. Since the same devices also showed typical photovoltaic effects under illumination, our results demonstrate a dual functionality in one device; polymer photovoltaic cells and polymer light-emitting diodes. \©2005 American Institute of Physics}, author = {Kim, Heejoo and Kim, Jin Y. and Park, Sung H. and Lee, Kwanghee and Jin, Youngeup and Kim, Jinwoo and Suh, Hongsuk }, citeulike-article-id = {587523}, comment = {pdf}, doi = {http://dx.doi.org/10.1063/1.1924869}, journal = {Applied Physics Letters}, keywords = {mehppv, pcbm, photovoltaic}, number = {18}, posted-at = {2006-04-15 12:11:23}, priority = {2}, publisher = {AIP}, title = {Electroluminescence in polymer-fullerene photovoltaic cells}, url = {http://dx.doi.org/10.1063/1.1924869}, volume = {86}, year = {2005} }

TY - JOUR ID - citeulike:587523 L3 - citeulike-article-id:587523 TI - Electroluminescence in polymer-fullerene photovoltaic cells JF - Applied Physics Letters VL - 86 IS - 18 PB - AIP N2 - We report electroluminescence (EL) in photovoltaic (PV) cells based on semiconducting polymer-fullerene composites. By applying a forward bias to the PV cells, the devices exhibited a clear EL action with a peak around 1.5 eV. We ascribe this peak to an "electric field-assisted exciplex" formed between the electrons in the fullerenes and the holes in the polymers, thereby resulting in radiative recombination in the composites. This finding is totally unexpected because of a strong photoluminescence quenching in the same materials. Since the same devices also showed typical photovoltaic effects under illumination, our results demonstrate a dual functionality in one device; polymer photovoltaic cells and polymer light-emitting diodes. ©2005 American Institute of Physics KW - mehppv KW - pcbm KW - photovoltaic N1 - pdf AU - Kim, Heejoo AU - Kim, Jin AU - Park, Sung AU - Lee, Kwanghee AU - Jin, Youngeup AU - Kim, Jinwoo AU - Suh, Hongsuk PY - 2005/// UR - http://dx.doi.org/10.1063/1.1924869 ER -