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Titolo:
TIME-RESOLVED LUMINESCENCE STUDY OF SELF-TRAPPED-EXCITON RELAXATION IN QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED MIXED-VALENCE METAL-COMPLEXES
Autore:
WADA Y; LEMMER U; GOBEL EO; YAMASHITA M; TORIUMI K;
Indirizzi:
NATL INST RES INORGAN MAT,1-1 NAMIKI TSUKUBA IBARAKI 305 JAPAN UNIV MARBURG,FACHBEREICH PHYS D-35032 MARBURG GERMANY UNIV MARBURG,ZENTRUM MAT WISSENSCH D-35032 MARBURG GERMANY NAGOYA UNIV,GRAD SCHOLL HUMAN INFORMAT NAGOYA AICHI 464 JAPAN HIMEJI INST TECHNOL,DEPT MAT SCI HARIMA HYOGO 67812 JAPAN
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 11, volume: 52, anno: 1995,
pagine: 8276 - 8282
SICI:
0163-1829(1995)52:11<8276:TLSOSR>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
PEIERLS-HUBBARD MODEL; NONLINEAR LATTICE-RELAXATION; N-ELECTRONS SYSTEM; SITE-SELECTIVE FLUORESCENCE; CHARGE-TRANSFER EXCITATION; WOLFFRAM RED SALT; CONJUGATED POLYMERS; OPTICAL-PROPERTIES; PLATINUM COMPLEX; RESONANCE RAMAN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
Y. Wada et al., "TIME-RESOLVED LUMINESCENCE STUDY OF SELF-TRAPPED-EXCITON RELAXATION IN QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED MIXED-VALENCE METAL-COMPLEXES", Physical review. B, Condensed matter, 52(11), 1995, pp. 8276-8282

Abstract

The relaxation processes of self-trapped excitons (STE's) in halogen-bridged mixed-valence metal complexes (MX-chain complexes) have been investigated by picosecond time-resolved luminescence measurements. Theself-trapped exciton luminescence of [Pt(en)(2)][Pt(en)(2)Cl-2](ClO4)(4) (en= ethylenediamine) decays exponentially with a lifetime of 230+/-10 psec at 2 K. The STE's are dominantly annihilated nonradiatively by tunneling and thermally activated processes. In an MX complex with ligand disorder caused by the random arrangement of the R,R and S,S-isomer ligand molecules, the STE's exhibit nonexponential decay. The decay dynamics varies with energy across the luminescence band and depends on the photon energy of the excitation laser. This behavior is explained by site-selective generation of STE's and their subsequent hopping relaxation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:33:48