pt. 1. Biomolecular systems
pt. 2. From molecular aggregates to organic solar cells.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Quantum efficiency in complex systems by Eicke R. Weber. ISBN 9780123910608. Published by Elsevier in 2010. Publication and catalogue information, links to buy online and reader comments.
