Kataria, M. et al.M. et al.KatariaYadav, K.K.YadavHaider, G.G.HaiderLiao, Y.M.Y.M.LiaoLiou, Y.-R.Y.-R.LiouCai, S.-Y.S.-Y.CaiLin, H.-I.H.-I.LinChen, Y.H.Y.H.ChenPaul Inbaraj, C.R.C.R.Paul InbarajBera, K.P.K.P.BeraLee, H.M.H.M.LeeYIT-TSONG CHENWang, W.-H.W.-H.WangYANG-FANG CHEN2019-12-272019-12-272017https://scholars.lib.ntu.edu.tw/handle/123456789/442986Numerous investigations of photon upconversion in lanthanide-doped upconversion nanoparticles (UCNPs) have led to its application in the fields of bioimaging, biodetection, cancer therapy, displays, and energy conversion. Herein, we demonstrate a new approach toward lanthanide-doped UCNPs and a graphene hybrid planar and rippled structure photodetector. The multi-energy sublevels from the 4fn electronic configuration of lanthanides results in longer excited state lifetime for photogenerated charge carriers. This opens up a new regime for ultra-high-sensitivity and broadband photodetection. Under 808 nm infrared light illumination, the planar hybrid photodetector shows a photoresponsivity of 190 AW-1, which is higher than the currently reported responsivities of the same class of devices. Also, the rippled graphene and UCNPs hybrid photodetector on a poly(dimethylsiloxane) substrate exhibits an excellent stretchability, wearability, and durability with high photoresponsivity. This design makes a significant contribution to the ongoing research in the field of wearable and stretchable optoelectronic devices. ? 2018 American Chemical Society.[SDGs]SDG3Electromagnetic wave attenuation; Energy conversion; Excited states; Nanoparticles; Optoelectronic devices; Photodetectors; Photons; Rare earth elements; Wearable technology; Broadband response; Electronic configuration; Excited state lifetimes; Hybrid photo detectors; Lanthanide-doped upconversion nanoparticles; Photogenerated charge carriers; Rippled graphene; Upconversion nanoparticles; Graphenejournal article10.1021/acsphotonics.8b001412-s2.0-85048742784https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048742784&doi=10.1021%2facsphotonics.8b00141&partnerID=40&md5=0daeab2df2fff2c4e6fac091a97a2470