Giovanni Bongiovanni
University of Cagliari
178 Papers
1.3K Citations
Giovanni Bongiovanni is an academic researcher from University of Cagliari. The author has contributed to research in topics: Photoluminescence & Exciton. The author has an hindex of 36, co-authored 158 publications. Previous affiliations of Giovanni Bongiovanni include École Polytechnique & University of Milan.
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Papers
Optical Amplification and Its Saturation in Semiconductor Quantum-Wells
TL;DR: In this article, the optical gain and its saturation of the electron-hole plasma confined in GaAs/(Ga,Al)As quantum wells were investigated, and the experimental results were compared with the predictions of a theoretical model of the optical quantum well amplifier.
Exciton–Exciton Interaction and Optical Gain in Colloidal CdSe/CdS Dot/Rod Nanocrystals
Michele Saba,Stefan Minniberger,Francesco Quochi,Juergen Roither,Marco Marceddu,Agnieszka Gocalinska,Maksym V. Kovalenko,Dmitri V. Talapin,Wolfgang Heiss,Andrea Mura,Giovanni Bongiovanni +10 more
TL;DR: Repulsive exciton-exciton interaction is demonstrated, which makes CdSe/CdS dot/rods promising gain media for solution-processable lasers, with projected pump threshold densities below 1 kW cm(-2) for continuous wave lasing.
Absorption F-sum rule for the exciton binding energy in methylammonium lead halide perovskites.
Nicola Sestu,Michele Cadelano,Valerio Sarritzu,Feipeng Chen,Daniela Marongiu,Roberto Piras,Marina Mainas,Francesco Quochi,Michele Saba,Antonio Andrea Mura,Giovanni Bongiovanni +10 more
TL;DR: The exciton binding energy in MAPbBr3 and MAPbI3 is determined based on an f-sum rule for integrated UV-vis absorption spectra, circumventing the pitfalls of least-squares fitting procedures, and implications of binding energy values on solar cell and LED workings are discussed.
Optical Gain Performance of Epitaxially Grown para‐Sexiphenyl Films
Fabrizio Cordella,Francesco Quochi,Michele Saba,Andrei Andreev,Helmut Sitter,Niyazi Serdar Sariciftci,Andrea Mura,Giovanni Bongiovanni +7 more
TL;DR: In this article, it was shown that dipole-assisted, heteroepitaxial techniques allow deposition of thin films with unusual long-range order, consisting of crystalline aggregates that self-assemble to form nanofibers with sub-micrometer cross section, lengths of up to millimeters, orientational alignment extending to the centimeter size range, and controllable interaggregate distance.
Raman spectra of CuGaS2-x Se x (x=0, 0.5, 1.0)
TL;DR: In this paper, the Raman spectra on the CuGaS2-x 1.5, 1.0 system were described for the first time and the observed structures were assigned on the basis of the analogies with binary solid solutions.