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2015 ; 5
(ä): 14281
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Replication of Leaf Surface Structures for Light Harvesting
#MMPMID26381702
Huang Z
; Yang S
; Zhang H
; Zhang M
; Cao W
Sci Rep
2015[Sep]; 5
(ä): 14281
PMID26381702
show ga
As one of the most important hosts of natural light harvesting, foliage normally
has complicated surface structures to capture solar radiances. Bio-mimicking leaf
surface structures can provide novel designs of covers in photovoltaic systems.
In this article, we reported on replicating leaf surface structures on
poly-(methyl methacrylate) polymers to prompt harvesting efficiencies. Prepared
via a double transfer process, the polymers were found to have high optical
transparencies and transmission hazes, with both values exceeding 80% in some
species. Benefiting from optical properties and wrinkled surfaces, the biomimetic
polymers brought up to 17% gains to photovoltaic efficiencies. Through
Monte-Carlo simulations of light transport, ultrahigh haze values and low
reflections were attributed to lightwave guidance schemes lead by the nano- and
micro-morphologies which are inherited from master leaves. Thus, leaf surface
bio-mimicking can be considered as a strategic direction to design covers of
light harvesting systems.