Using Two Compatible Donor Polymers Boosts the Efficiency of Ternary Organic Solar Cells to 17.7%

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Efficiency enhancement in organic solar cells with ferroelectric polymers.

The recombination of electrons and holes in semiconducting polymer-fullerene blends has been identified as a main cause of energy loss in organic photovoltaic devices. Generally, an external bias voltage is required to efficiently separate the electrons and holes and thus prevent their recombination. Here we show that a large, permanent, internal electric field can be ensured by incorporating a...

Towards High-Efficiency Organic Solar Cells: Polymers and Devices Development

Charge-carrier generation in organic solar cells using crystalline donor polymers.

Charge generation and recombination dynamics in a blend film of a crystalline low-bandgap polymer, poly[(4,4-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(4,7-bis(2-thienyl)-2,1,3-benzothiadiazole)-4,7-diyl] (PSBTBT), and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) were studied by transient absorption spectroscopy. Upon photoexcitation of the PSBTBT absorption band at 800 ...

Improving Organic Solar Cells through Using Ternary Systems

book, Solar Cells 2016. 1 IMPROVING ORGANIC SOLAR CELLS THROUGH USING TERNARY SYSTEMS Ana CHARAS, Joana FARINHAS, Ricardo OLIVEIRA, Jorge MORGADO Instituto de Telecomunicações, IST, Av. Rovisco Pais, 1049-001, Lisbon, Portugal [email protected] Bulk heterojunctions based on ternary blends of materials of complementary properties have been explored as an approach to improve organic photovoltai...