Research Lines



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Current research lines: 

  • Enhancement of photocatalytic action of large band-gap semiconductors materials (i.e, TiO2) by high intense UV-blue up-conversion photonics


TurningSun intoBlue

  • White ligth generation and colour tuneability by rare-earth doped upconversion luminescent materials (glasses, nano-glass-ceramics, etc)

Full-size image (32 K)

 RE materials

Former research lines: 

  • Down and up-conversion processes in RE-doped nano-glass-ceramics for enhancement of silicon solar cells efficiency for photovoltaic applications


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V.D. Rodríguez, V. K. Tikhomirov, J. Méndez-Ramos, A.C. Yanes, V.V. Moshchalkov

"Towards broad range and highly efficient down-conversion of solar spectrum by Er3+-Yb3+ co-doped nano-structured glass-ceramics"

Solar E

nergy Materials and Solar Cells. 94, pp. 1612 - 1617 (2010)


A.C. Yanes, J. del-Castillo, J. Méndez-Ramos, V.D. Rodríguez,

"Sol-Gel Glass-Ceramics Comprising rare-earth Doped SnO2 and LaF3 Nanocrystals: an efficient simultaneous UV and IR to visible converter

Journal of Nanoparticle Research. 13, pp. 7295 - 7301 (2011) 

  • Broad and flat gain cross-section of 1.5 micron for Erbium doped optical amplifier (Shape of 1.55 micron emission in Er3+-doped oxyfluoride nano-glass-ceramics)

Fiber 1Er1500nmFiber 2

V.D. Rodríguez, V.K. Tikhomirov, J. Méndez-Ramos, A.B. Seddon 
EPL-Europhysics Letters. 69 - 1, pp. 128 - 134 (2005)

J. Méndez-Ramos, V.K. Tikhomirov, A.B. Seddon, V.D. Rodríguez 
Physica Status Solidi (a). 201 - 9, pp. 57 - 59 (2004)



Publications / Congress / Patents

linkaplcover 102/10CoverIssueJMCC Chemical Physics LettersSolar Energy Materials & Solar Cells


Cover image for Vol. 23 Issue 11


 adv sci cover

Selected TOP publications of Group´s Coordinator,

Dr. Jorge Méndez-Ramos


  1. J. Méndez-Ramos; J.C. Ruiz-Morales; P. Acosta-Mora; N.M. Khaidukov. "Infrared-light induced curing of photosensitive resins through photon up-conversion for novel cost-effective luminescent 3D-printing technology", Journal of Materials Chemistry C. 4, pp. 801. RSC, 2016. DOI: 10.1039/C5TC03315B 

  2. Lothar Wondraczek; Esa Tyystjärvi; Jorge Méndez-Ramos; Frank A. Müller; Qinyuan Zhang. "Shifting the Sun: "Shifting the Sun: Solar spectral conversion and extrinsic sensitization in natural and artificial photosynthesis", Advanced Science. 2-12, pp. 1500218. Wiley, 2015. DOI: 10.1002/advs.201500218 

  3. J. Méndez-Ramos, P. Acosta-Mora, J. C. Ruiz-Morales, T. Hernández, M. E. Borges, P. Esparza, "Turning into the blue: materials for enhancing TiO2 photocatalysis by up-conversion photonics", RSC Advances,2013,3,23028, DOI:10.1039/C3RA44342F

  4. J. Méndez-Ramos, J.C. Ruiz-Morales, P. Acosta-Mora, J. del-Castillo, A.C. Yanes, “Rare-earth doped nano-glass-ceramics for extending spectral response of water-splitting semiconductor electrodes by high intense UV-blue up-conversion: turning the sun into blue” , Journal of Power Sources, 238, 313 (2013), DOI: 10.1016/j.jpowsour.2013.03.068

  5. J. Méndez-Ramos, P. Acosta-Mora, J.C. Ruiz-Morales, N.M. Khaidukov, "Role of the Yb3+ concentration in the high efficient UV-blue up-conversion emission from hydrothermally grown Yb3+/ Er3+-doped K2YF5 crystals" , J. Alloys and Compounds, 575, p. 263, (2013), DOI: 10.1016/j.jallcom.2013.04.014 
  6. J. Méndez-Ramos, P. Acosta-Mora, J.C. Ruiz-Morales, T. Hernández, M.E. Borges, P. Esparza, "Heavy Rare-Earth-doped ZBLAN glasses for UV-blue up-conversion and white light generation", J. Luminiscence, 143, p. 479, (2013), DOI:
  7. A.C. Yanes, A. Santanta-Alonso, J. Méndez-Ramos, J. del-Castillo, "Structure and intense UV up-conversion emissions in RE3+-doped sol-gel glass-ceramics containing KYF4 nanocrystals", accepted for publication, in press, Appl. Phys. B, DOI: 10.1007/s00340-013-5514-2 
  8. J. Méndez Ramos; A.C. Yanes; A. Santana-Alonso; J. del-Castillo, Highly efficient up-conversion and bright white light in RE co-doped KYF4 nanocrystals in sol-gel silica matrix. Chemical Physics Letters, 555, 196 (2013). 
  9. A. Santana-Alonso; A.C. Yanes; J. Méndez-Ramos; J. del-Castillo, “Up-conversion tuneability in sol-gel derived SiO2-KYF4 nano-glass-ceramics doped with Yb3+-Ho3+-Tm3+, accepted for publication, in press, Science of Advanced Materials (2013), DOI: 10.1166/sam.2013.1493
  10. A.S.Kuznetsov, J.J.Velázquez, V.K. Tikhomirov, J. Méndez-Ramos, V.V. Moshchalkov, Quantum yield of luminescence of Ag nanoclusters dispersed within transparent bulk glass vs. glass composition and temperature, Applied Physics Letters, 101, 251106 (2012). 
  11. V.K. Tikhomirov; V.D. Rodríguez; J. Méndez-Ramos; J. del-Castillo; D. Kirilenko; G. Van Tendeloo; V.V. Moshchalkov, Optimizing Er/Yb ratio and content in Er-Yb co-doped glass-ceramics for enhancement of the up and down-conversion luminescence, Solar Energy Materials and Solar Cells,100, 209 (2012). Citations (excluding self-citations): 3 
  12. A.C. Yanes; A. Santana-Alonso; J. Méndez-Ramos; J. del-Castillo; V.D. Rodríguez. Novel Sol-Gel Nano-Glass-Ceramics Comprising Ln3+-Doped YF3 Nanocrystals: Structure and High Efficient UV Up-Conversion, Advanced Functional Materials, 21, 3136 (2011). Citations(excluding self-citations): 4 
  13. V.K. Tikhomirov, J. Méndez-Ramos, V.D. Rodríguez, D. Furniss. Infrared tuneable up-conversion phosphor based on Er3+-doped nano-glass-ceramics, Journal of Alloys and Compounds 440, 328 (2007). Citations (excluding self-citations): 21 
  14. A.C. Yanes, V.D. Rodríguez, J. Del Castillo, J. Méndez-Ramos, M. Torres, J. Peraza, Nanocrystal-size selective spectroscopy in SnO2:Eu3+ semiconductor quantum-dots, Applied Physics Letters, 85, 2343 (2004). Citations (excluding self-citations): 58 
  15. M. Abril, J. Méndez-Ramos, I.R. Martín, U.R. Rodríguez-Mendoza, V. Lavín, A. Delgado-Torres, V.D. Rodríguez, P. Núñez, A.D. Lozano-Gorrín, "Optical properties of Nd3+ ions in oxyfluoride glasses and glass ceramics comparing different preparation methods, Journal of Applied Physics, 95, 5271(2004). Citations (excluding self-citations): 59 
  16. J. Méndez-Ramos, V. Lavín, I.R. Martín, U.R. Rodríguez-Mendoza, J.A. González-Almeida, V.D. Rodríguez, A.D. Lozano-Gorrín, P. Núñez, Optical properties of Er3+ ions in transparent glass ceramics", Journal of Alloys and Compounds, 323, 753 (2001). Citations (excluding self-citations): 51 




1. Title: System for the enhancement of hydrogen production through water photolysis increasing the spectral response of a catalytic semiconductor. Patent nº: P201200883 (7th September 2012)

2. Title: Material for efficient simultaneous UV and IR to visible conversion. Patent nº: P201001172. (4th September 2010)

3. Title: Colour tuneability and white light generation in triply lanthanide doped nano-glass-ceramic (25th May, 2007). Patent nº: P200701609 Publication nº: ES2319044 (Date of publication 16/02/10) 



53 contributions to peer-reviewed International established Conferences mainly as posters and also with several oral presentations. Some of selected conferences are: International Conference on f-elements (ICFE’4-8 series, 2000-2012), Trends in Nanotechnology, TNT Series 2005-2011; International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, ICL series 2008-2011;  International Conference on Dynamical Processes in Excited States of Solids, DPC series 2001-2007 and European Materials Research Society Spring Meeting EMRS Series 2005-2007 among others. (more details, see Extended CV)

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Selected publications of interest
  • Ciamician, G., Science 36 (1912) 385.
  • Ruiz-Morales, J.C., Canales-Vázquez, J, Savaniu, C, Marrero-López D, Zhou W, and Irvine J. T.S., Nature 439 (2006) 568.
  • Kanan, M.W., Nocera, D.G., Science, 321 (2008) 1072; Nocera, D.G., Accounts of Chemical Research, 45 (2012) 767.
  • Fujishima, A., Honda, K., Nature, 238 (1972) 37.
  • Luo, J., Ma, L., He, T., Ng, C.F., Wang, S., Sun, H. and Fan, H.J., J. Phys. Chem C, 116, (2012) 11956.
  • Liu, G., Yin, L.C., Wang, J., Niu, P., Zhen, C., Xie, Y. and Cheng, H.M., Energy & Environmental Science, 5 (2012) 9603.
  • Xu, X., Randorn, C., Efstathiou, P. and Irvine, J.T.S, Nature Materials, 11 (2012) 595.
  • Khnayzer, R.S., Blumhoff, J., Harrington, J.A., Haefele, A., Deng, F., Castellano, F.N., Chem. Comm., 48 (2012) 209.
  • Li, C., Wang, F., Zhu, J., Yu, J.C., Applied Catalysis B: Environmental, 100 (2010) 433.
  • Wang, J., Zhang, G., Zhang, Z., Zhang X., Zhao, G., Wen, F., Pan, Z., Li, Y., Zhang, P., Kang, P., Water Research, 40 (2006) 2143.
  • Feng, G., Liu S., Xiu, Z., Zhang, Y., Yu, J., Chen, Y., Wang, P., Yu, X., J. Phys. Chem. C, 112 (2008) 13692.
  • Obregón, S., Colón, G., Chem. Commun., 48 (2012) 7865.
  • Zhang, Z., Wang, W.,, Yin, W., Shang, M., Wang, L., Sun, S., Applied Catalysis B: Environmental, 101 (2010) 68.
  • Zhang, M., Lin, Y., Mullen, T.J., Lin, W., Sun, L.D., Yan, C.H., Pattern, T.E., Wang, D., and Liu, G., J. Phys. Chem. Lett., 3 (2012) 3188.
  • Richards, B., Sol. Energy Mater. Sol. Cells, 90 (2006) 2329.
  • Rodríguez, V.D., Tikhomirov, V.K., Méndez-Ramos, J., Yanes, A.C., Moshchalkov, V.V., Sol. Energy Mater. Sol. Cells, 94 (2010) 1612.
  • Wang, Y. and Ohwaki, J., Appl. Phys. Lett., 63 (1993) 3268.
  • Méndez-Ramos, J., Lavín, V., Martín, I.R., Rodríguez-Mendoza, U.R., González-Almeida, J.A., Rodríguez ,V.D., Lozano-Gorrín, A.D. and Núñez, P., J. Alloys and Compounds 323-324 (2001) 753.
  • Kamat, P.V., J. Phys. Chem. Lett. 3 (2012) 663.
  • Yanes, A.C., Santana-Alonso, A., Méndez-Ramos, J., del-Castillo, J., Rodríguez, V.D., Advanced Functional Materials 21 (2011) 3136.
  • Méndez Ramos, J., Yanes, A.C., Santana-Alonso, A., del-Castillo, J., Chemical Physics Letters, 555 (2013) 196.
  • Lian, S., Rong, C., Yin, D. and Liu, S., J. Phys. Chem C, 113 (2009) 6928.

Highlights Asuntos destacados