High Efficient Organic Solar Cells

Mushfika baishakhi upama md arafat mahmud gavin conibeer ashraf uddin trendsetters in high efficiency organic solar cells.

High efficient organic solar cells.

Changing the length and functional group of polymers can change the. V shaped electron acceptor btp 2br enables more effective in exciton dissociation at near zero homo offset over those of linear acceptor sn6 2br in organic solar cells with pbdt tf polymer herein yielding the power conversion efficiencies of 13 84 with low voltage loss of 0 46 v in opaque device and efficiency of 9 62 with an avt of 20 1 in semitransparent devices. Srikanth revoju subhayan biswas bertil eliasson ganesh d. Journal of materials chemistry a 2018 6 20 9613 9622.

A non fullerene acceptor dty6 with long branched alkyl chains was synthesized and showed a power conversion efficiency pce of 16 1 when using a non halogen solvent. As a result organic solar cells oscs based on the bttpc br acceptor outperforming those of bttpc pbdb t and y5 pbdb t reach a power conversion efficiency of 15 22 which is so far one of the highest among the single junction oscs made with pbdb t polymer donor. Combined with the flexibility of organic molecules organic solar cells are potentially cost effective for photovoltaic applications molecular engineering e g. The resulting devices exhibited outstanding power conversion efficiency of 16 1 for small area organic cells 0 04 cm2 and 14 4 for large area.

The team synthesized a non fullerene acceptor dty6 through side chain engineering and demonstrated its implementation in high efficiency small area organic solar cells and large area modules. The high efficiency in combination with the low cost of materials and processes are the selling points of this cell over commercial silicon or other organic and inorganic solar cells. Efficiency and stability of organic solar cells oscs are two decisive factors for its future practical applications the first prerequisite for achieving efficient oscs is to harvest as much photon as possible by the active layer. However the retention of high boiling point liquid additives affects the stability and lifetime of oscs necessitating the development of v journal of materials chemistry a hot papers.

Toward 20 power conversion efficiency solar rrl 10 1002 solr 201900342 4 1 2019. Encouragingly the large area modules 18 cm2 exhibited an outstanding pce of 14 4 certified to be 13 98 by a third party accredited institute which is by far the highest module efficiency reported to date. High efficiency organic solar cells based on a small molecule donor and a low bandgap polymer acceptor with strong absorption.