Transparent
wood is a candidate for use as an energy-saving building
material due to its low density (ca. 1.2 g/cm3), high optical
transmittance (over 85% at 1 mm thickness), low thermal conductivity
(0.23 W m–1 K–1), and good load-bearing
performance with tough failure behavior (no shattering). High optical
transmittance also makes transparent wood a candidate for optoelectronic
devices. In this work, for the first time, perovskite solar cells
processed at low temperature (<150 °C) were successfully assembled
directly on transparent wood substrates. A power conversion efficiency
up to 16.8% was obtained. The technologies demonstrated may pave the
way for integration of solar cells with light transmitting wood building
structures for energy-saving purposes.
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