Black diamond is obtained by a controlled nanoscale periodic texturing of CVD diamond surface, able to drastically modify the interaction with solar radiation from optical transparency up to solar absorptance values even >90%. Surface texturing, performed by the use of an ultra-short pulse laser, is demonstrated to induce an intermediate band within the diamond bandgap supporting an efficient photoelectronic conversion of sub-bandgap photons (<5.5 eV). The intermediate band introduction results in an external quantum efficiency enhanced up to 800 nm wavelengths (and up two orders of magnitude larger than the starting transparent diamond film), without affecting the film transport capabilities. The optical and photoelectronic outstanding results open the path for future application of black diamond as a photon-enhanced thermionic emission cathode for solar concentrating systems, with advantages of excellent electronic properties combined with a potentially very low work function and high thermal stability.

Calvani, P., Bellucci, A., Girolami, M., Orlando, S., Valentini, V., Polini, R., et al. (2016). Black diamond for solar energy conversion. CARBON, 105, 401-407 [10.1016/j.carbon.2016.04.017].

Black diamond for solar energy conversion

POLINI, RICCARDO;
2016-01-01

Abstract

Black diamond is obtained by a controlled nanoscale periodic texturing of CVD diamond surface, able to drastically modify the interaction with solar radiation from optical transparency up to solar absorptance values even >90%. Surface texturing, performed by the use of an ultra-short pulse laser, is demonstrated to induce an intermediate band within the diamond bandgap supporting an efficient photoelectronic conversion of sub-bandgap photons (<5.5 eV). The intermediate band introduction results in an external quantum efficiency enhanced up to 800 nm wavelengths (and up two orders of magnitude larger than the starting transparent diamond film), without affecting the film transport capabilities. The optical and photoelectronic outstanding results open the path for future application of black diamond as a photon-enhanced thermionic emission cathode for solar concentrating systems, with advantages of excellent electronic properties combined with a potentially very low work function and high thermal stability.
2016
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
English
Con Impact Factor ISI
The activity was supported by the European Community FP7-Energy Project ProME3ThE2US2 “Production Method of Electrical Energy by Enhanced Thermal Electron Emission by the Use of Superior Semiconductors”, Grant Agreement n. 308975, website: www.prometheus-energy.eu.
http://www.sciencedirect.com/science/article/pii/S0008622316302780
Calvani, P., Bellucci, A., Girolami, M., Orlando, S., Valentini, V., Polini, R., et al. (2016). Black diamond for solar energy conversion. CARBON, 105, 401-407 [10.1016/j.carbon.2016.04.017].
Calvani, P; Bellucci, A; Girolami, M; Orlando, S; Valentini, V; Polini, R; Trucchi, D
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
CARBON_2016_105_401-407.pdf

accesso aperto

Descrizione: Articolo principale
Licenza: Creative commons
Dimensione 1.45 MB
Formato Adobe PDF
1.45 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/143107
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 66
  • ???jsp.display-item.citation.isi??? 59
social impact