Lock-in phase analysis of copper phthalocyanine photoabsorption spectrum

• Autorzy: Wojdyła M. , Derkowska B. , Bała W.
• Konferencja: Surface Physics and Thin-Films Structure Seminar ; 17-21.05.2005 ; Szklarska Poręba, Poland
• Języki publikacji: EN

Abstrakty

EN

The modulated photoabsorption (PA) spectra in Q-band spectral region of copper phthalocyanine (CuPc) thin layer have been investigated using two-channel lock-in phase resolved technique. Combining measurements in-phase and out-phase we determined four different features, which are observed in PA spectra. A detailed analysis of the in-phase and out-phase multicomponent PA spectra and corresponding phase diagram enabled separation of particular components as well as determination of their phase delay angle and corresponding time constants. In the CuPc sample under study, the various components of PA spectrum show different phase shifts, which implies different mechanism giving rise to the photoinduced electric field modulation.

Słowa kluczowe

EN

CuPc; thin layers; photoabsorption; absorption

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2005
• Tom: Vol. 35, nr 3
• Strony: 561--571
• Opis fizyczny: Bibliogr. 20 poz., wykr.

Twórcy

autor

Wojdyła M.

• Institute of Physics, Nicolaus Copernicus University (UMK), Grudziądzka 5, 87-100 Toruń, Poland

autor

Derkowska B.

• Institute of Physics, Nicolaus Copernicus University (UMK), Grudziądzka 5, 87-100 Toruń, Poland

autor

Bała W.

• Institute of Physics, Nicolaus Copernicus University (UMK), Grudziądzka 5, 87-100 Toruń, Poland

Bibliografia

• [1] Kim S.K., Chung T.G., Chung D.H., Lee H.S., Song M.J., Park J.W., Lee J.U., Kim T.W., Improvement of efficiency in organic light-emitting diodes using PVK and CuPc buffer layer, Optical Materials 21(1-3), 2003, pp. 159-64.
• [2] Tadayyon S.M., Grandin H.M., Griffiths K., Norton P.R., Aziz H., Popovic Z.D., CuPc buffer layer role in OLED performance: a study of the interfacial band energies, Organic Electronics 5(4), 2004, pp. 157-66.
• [3] Stenzel O., Stendal A., Voigtsberger K., von Borczyskowski C., Enhancement of the photovoltaic conversion efficiency of copper phthalocyanine thin film devices by incorporation of metal clusters, Solar Energy and Solar Cells 37(3-4), 1995, pp. 337-48.
• [4] Gu D., Chen Q., Tang X., Gan F., Shen S., Liu K., Xu H., Application of phthalocyanine thin films in optical recording, Optics Communications 121(4-6), 1995, pp. 125-9.
• [5] Wang p., Zhuang S., Wu P., Ye Ch., Liu H., Xi F., Optical limiting properties of optically active phthalocyanine derivatives, Chemical Physics Letters 340(3-4), 2001, pp. 261-6.
• [6] Szybowicz M., Runka T., Drozdowski M., Bala W., Grodzicki A., Piszczek P., Bratkowski A., High temperature study of FT-IR and Raman scattering spectra of vacuum deposited CuPc thin films, Journal of Molecular Structure 704(1-3), 2004, pp. 107-13.
• [7] Djurisic A.B., Kwong C.Y., Lau T.W., Guo W.L., Li E.H., Liu Z.T., Kwok H.S., Lam L.S.M., Chan W.K., Optical properties of copper phthalocyanine, Optics Communications 205(1-3), 2002, pp. 155-62.
• [8] Shen H., Dutta M., Franz-Keldysh oscillations in modulation spectroscopy, Journal of Applied Physics 78(4), 1995, pp. 2151-76.
• [9] SCHREIBER J., Kircher W., Hildebrandt S., Gansha a., Kuzmenko R., Lock-in phase studies of EfjPR spectra on GaA^s, Proc. Workshop on Highlights of Light Spectroscopy on Semiconductors (HOLSOS 95), Frascati 1995, pp. 29-32.
• [10] Ganzha A.V., Kusmenko R.V., Kircher W., Schreiber J., Hildebrandt S., Lock-in-phaseanalysis of n-GaAsphotoreflectance spectra, Semiconductors 32(3), 1998, pp. 245-9.
• [11] Misiewicz J., Sitarek P., Sęk G., Introduction to the photoreflectance spectroscopy ofsemiconductor structures, OW PWr, Wrocław 1999.
• [12] Kuz'menko R., Ganzha A., Schreiber J., Hildebrandt S., Identification of the multicomponent nature of Eg photoreflectance spectra from moderately doped GaAs substrates, Physics of the Solid State 39(12), 1997, pp. 1900-5.
• [13] Hildebrandt S., Murtagh M., Kuzmenko R., Kircher W., Schreiber J., Analysis of synchronous phase, pump power, and pump wavelength dependent complex PR spectra from GaAs MBE structures, Physica Status Solidi A 152(1), 1995, pp. 147-60.
• [14] El-Nahass M.M., Bahabri F.S., Al-Harabi R., Optical properties of copper phthalocyanine (CuPc)thin f^ilms, Egyptian Journal of Solids 24(1), 2001, pp. 11-9.
• [15] Nuesch F., Carrara M. , Schaer M. , Romero D.B., Zuppiroli L., The role of copper phthalocyanine for charge injection into organic light emitting devices, Chemical Physics Letters 347(4-6), 2001, pp. 311-7.
• [16] Stendal A., Beckers U., Wilbrandt S., Stenzel O., von Borczyskowski C., The linear optical constants of thin phthalocyanine and fullerite films from the near infrared up to the UV spectral regions: estimation of electronic oscillator strength values, Journal of Physics B: Atomic, Molecular and Optical Physics 29(12), 1996, pp. 2589-95.
• [17] Leznoff C.C., Lever A.B.P., Phthalocyanines, Properties and Applications, VCH Publishers, New York 1989.
• [18] Knupfer M., Schwieger T., Piesert H., Fink J., Mining of Frenkel and charge transfer excitons in quasi-one-dimensional copper phthalocyanine molecular crystals, Physical Review B: Condensed Matter and Materials Physics 69(16), 2004, pp. 165210/1-5.
• [19] Haraguchi M., Nakagawa Y., Fukui M., Muto S., Two modulation mechanisms for photoreflectance from GaAss/AilAss multiple quantum well, Superlattices and Microstructures 13(3), 1993, pp. 341-6.
• [20] Misiewicz J., Sęk G., Kudrawiec R., Sitarek P., Photomodulated reflectance and transmittance: optical characterisation of novel semiconductor materials and device structures, Thin Solid Films 450(1), 2004, pp. 14-22.