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Novel fabrication techniques to manufacture various high performance devices, using both Si and III–V nanomembrane-form materials, that are essential for portable electronics on a biodegradable cellulose nanofibril (CNF) paper are presented. We have introduced a concept of natural biodegradation of the discarded electronic chips that could help reduce the accumulation of the massive amount of persistent...
Flexible and stretchable electronics have broad applications and will further change our life and improve our life quality in numerous ways in the near future. While low frequency flexible electronics and stretchable electronics have been well developed and have penetrated into many applications, the high-frequency (beyond GHz in the microwave frequency range) counterparts have faced great challenges...
Tandem solar cells using different bandgap materials provide higher energy conversion efficiency than single junction cells. However, the need for current matching and lattice matching often restricts the material selection for multi-junction solar cells. To overcome these challenges, we report AlGaAs/Si dual-junction tandem solar cells fabricated by a combined epitaxial lift-off (ELO) and print-transfer...
A much-simplified method of making flexible GaN blue light-emitting diode (LED) array on a plastic substrate was demonstrated. A sticky elastomeric stamp was first brought into contact with prefabricated GaN LED array on a sapphire substrate. Laser liftoff was applied by shining laser light through the sapphire substrate. The released LED array sitting on the stamp was transferred to a polyethylene...
RF performance flexible thin-film transistors toward green portable devices were realized. The cellulose nanofibrillated fiber (CNF) substrate combined with Si nanomembranes (Si NMs) printing technique enables to fabricate flexible, high-speed and bio-degradable devices. Flexible Si NM thin-film transistors (TFTs) built on the CNF substrate show mobility of 336 cm/v·s and fT and fmax of 2.4 GHz and...
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