Listar por autoría "2e0d40db-a7eb-4bfa-b589-1b7bbdb07610"
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Charge carrier mobility and lifetime of organic bulk heterojunctions analyzed by impedance spectroscopy
Garcia-Belmonte, Germà; Munar, Antoni; Barea, Eva M; Bisquert, Juan; Ugarte, Irati; Pacios, Roberto Elsevier (2008)Charge carrier diffusion and recombination in an absorber blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C<sub>61</sub>-butyric acid methyl ester (PCBM) with indium tin oxide (ITO) and aluminium contacts have been ... -
Charge carrier transport and contact selectivity limit the operation of PTB7-based organic solar cells of varying active layer thickness
Guerrero, Antonio; Montcada, Núria F.; Ajuria, Jon; Etxebarria, Ikerne; Pacios, Roberto; Garcia-Belmonte, Germà; Palomares, Emilio Royal Society of Chemistry (2013-08)In this work we study the different electrical loss pathways occurring during the operation of bulk heterojunction solar cells by using a variety of electrical and optical characterization techniques beyond the current ... -
Determination of gap defect states in organic bulk heterojunction solar cells from capacitance measurements
Pérez Boix, Pablo; Garcia-Belmonte, Germà; Muñecas, Udane; Neophytou, Marios; Waldauf, Christoph; Pacios, Roberto American Institute of Physics (2009)Energy distributions [density-of-states (DOS)] of defects in the effective band gap of organic bulk heterojunctions are determined by means of capacitance methods. The technique consists of calculating the junction capacitance ... -
Inverted vs Standard PTB7:PC70BM Organic Photovoltaic Devices. The benefit of highly selective and extracting contacts in device performance
Etxebarria, Ikerne; Guerrero, Antonio; Albero, Josep; Garcia-Belmonte, Germà; Palomares, Emilio; Pacios, Roberto Elsevier (2014)In this work we compare the photovoltaic performance of different cell designs, standard and inverted, for one of the most promising systems to achieve power conversion efficiencies over 10% in polymer:fullerene single ... -
Role of Zn0 electron-selective layers in regular and inverted bulk heterojunction solar cells
Garcia-Belmonte, Germà; Bisquert, Juan; Pérez Boix, Juan; Pacios, Roberto; Etxebarria, Ikerne; Ajuria, Jon American Chemical Society (2011-02)Here the role of metal oxide (ZnO) electron-selective layers in the operating mechanisms of bulk-heterojunction polymer−fullerene solar cells is addressed. Inverted as well as regular structures containing ZnO layers at ...