Photovoltaic limitations of BODIPY:fullerene based bulk heterojunction solar cells

Photovoltaic limitations of BODIPY:fullerene based bulk heterojunction solar cells

Derya Baran, Sachetan Tuladhar, Solon P. Economopoulos, Marios Neophytou, Achilleas Savva, Grigorios Itskos, Andreas Othonos, Donal D.C. Bradley, Christoph J. Brabec, Jenny Nelson, Stelios A. Choulis. " Photovoltaic limitations of BODIPY:fullerene based bulk heterojunction solar cells " Synthetic Metals 226 (2017) 25–30​
Derya Baran, Sachetan Tuladhar, Solon P. Economopoulos, Marios Neophytou, Achilleas Savva, Grigorios Itskos, Andreas Othonos, Donal D.C. Bradley, Christoph J. Brabec, Jenny Nelson, Stelios A. Choulis
Organic solar cells, BODIPY, polymer donors, Fractionation process, Charge transport, Collection, Morphology
2017
​The photovoltaic performance of blends of a series of 4,40 -Difluoro-4-bora-3a,4a-diaza-s-indacenes)- based (BODIPY) conjugated polymers donors with fullerene electron acceptors is investigated. Despite the high Voc values observed, solar cell device yields relatively low power conversion efficiencies. Our study takes into account the materials’ structure-property relationship, light harvesting capabilities, charge transport, collection properties and morphological characteristics to elucidate factors affecting the photovoltaic performance in this class of polymers. We show that elimination of low molecular weight species and suitable electrodes for hole collection can be used to overcome some of the observed limitations on photovoltaic performance.