S
Stephan Heer
Researcher at University of Bern
Publications - 17
Citations - 2806
Stephan Heer is an academic researcher from University of Bern. The author has contributed to research in topics: Photon upconversion & Lanthanide. The author has an hindex of 14, co-authored 17 publications receiving 2674 citations.
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Journal ArticleDOI
Highly Efficient Multicolour Upconversion Emission in Transparent Colloids of Lanthanide-Doped NaYF4 Nanocrystals
Journal ArticleDOI
Novel materials doped with trivalent lanthanides and transition metal ions showing near-infrared to visible photon upconversion
J.F. Suyver,Annina Aebischer,Daniel Biner,Pascal Gerner,Judith Grimm,Stephan Heer,Karl Krämer,Christine Reinhard,Hans-Ulrich Güdel +8 more
TL;DR: In this article, an overview of the recent results on upconversion spectroscopy obtained in our group is presented, where it is demonstrated that as much as 50% of the NIR excitation photons contribute to the up-conversion emission.
Journal ArticleDOI
Blue, Green, and Red Upconversion Emission from Lanthanide‐Doped LuPO4 and YbPO4 Nanocrystals in a Transparent Colloidal Solution
Journal ArticleDOI
Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4: Yb3+, Er3+
TL;DR: In this paper, high quality nanocrystals of hexagonal β-NaGdF 4 codoped with Yb 3+ and Er 3+ were synthesized by controlled precipitation in high boiling organic solvents.
Journal ArticleDOI
Low-temperature upconversion spectroscopy of nanosized Y2O3:Er,Yb phosphor
TL;DR: In this article, the structural characterization and low-temperature upconversion spectroscopy of the Y2O3:2%Er,1%Yb nanophosphor prepared by thermal decomposition of a polymeric resin was reported.