Bridge effects on light harvesting of a DBfA type polymer system

Sam-Shajing Sun; Muhammad Hasib; Alexander V. Gavrilenko; Joshua Devan; Vladimir Gavrilenko

doi:10.1117/12.2239027

26 September 2016 Bridge effects on light harvesting of a DBfA type polymer system

Sam-Shajing Sun, Muhammad Hasib, Alexander V. Gavrilenko, Joshua Devan, Vladimir Gavrilenko

Proceedings Volume 9942, Organic Photovoltaics XVII; 99421E (2016) https://doi.org/10.1117/12.2239027
Event: SPIE Organic Photonics + Electronics, 2016, San Diego, California, United States

Abstract

Plastic optoelectronic materials and thin film devices are very attractive in future optical sensor and solar energy applications due to their lightweight, flexible shape, high photon absorption coefficients, low cost, and environmental benefits. In this study, optoelectronic properties of D, D/fA blend, DfA, and a series of DBfA type of conjugated block copolymers has been investigated, where D is a donor type PPV conjugated block, B is a non-conjugated and flexible aliphatic hydrocarbon bridge chain containing different number of aliphatic methylene units, and fA is a fluorinated acceptor type PPV conjugated block. The optical absorptions of the D/fA blend, DfA, and DBfAs are typical overlaps of individual absorptions of D and fA blocks, while the solution steady state photoluminescence (PL) emission of D were quenched to different levels in blends and block copolymers, with DBfAs containing one methylene unit bridge (DB₁fA) quenched most. This could be attributed to an intra-molecular photo induced electron transfer or charge separation in DBfA systems. Theoretical first principles study of the equilibrium atomic configuration of DfA reveals the existence of twisting angles between the D and fA blocks in DfA stable states which may account for a less PL quenching of DfA as compared to DB₁fA. These results are important for designing and developing high efficiency polymer based optoelectronic systems.

Citation Download Citation

Sam-Shajing Sun, Muhammad Hasib, Alexander V. Gavrilenko, Joshua Devan, and Vladimir Gavrilenko "Bridge effects on light harvesting of a DBfA type polymer system", Proc. SPIE 9942, Organic Photovoltaics XVII, 99421E (26 September 2016); https://doi.org/10.1117/12.2239027

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available