AIII-BV(N) photodetectors with functionally graded active area

• Autorzy: Wośko M. , Paszkiewicz B. , Piasecki T. , Prażmowska J. , Paszkiewicz R. , Tłaczała M.
• Języki publikacji: EN

Abstrakty

EN

Functionally graded materials (FGM) find widespread for mechanical applications. Nowadays, they become more and more attractive in fabrication of electronic and optoelectronic devices. This is due to by their unique properties. FGM are potential candidates for high sensitive photonic devices which could operate in a wide spectral range (also for voltage tunable photodetectors). In this paper, the analysis of several photodetector constructions fabricated in FGM has been presented. The influence of AIII-BV(N) grading layers composition and configuration of the detector on its optical and electrical properties has been discussed. Also, a comparison between conventional non-graded and graded devices has been made. All simulations presented in the work are performed by the specialized software designed for modeling AIII-BV(N) graded structures. The software allow us to calculate both the parameters of FGM structure and device characteristics. During the simulation process it was noticed that the bandgap gradation in phototodetector active area improved its sensitivity up to 150% compared to classical, non-graded structures. Also, another effect such the wavelength sensitivity observed in these devices makes them very attractive for applications in which the high sensitive wavelength dependence is a key factor.

Słowa kluczowe

EN

FGM; graded materials; photodetector; simulation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2007
• Tom: Vol. 37, nr 1-2
• Strony: 161--165
• Opis fizyczny: Bibliogr. 4 poz.,

Twórcy

autor

Wośko M.

autor

Paszkiewicz B.

autor

Piasecki T.

autor

Prażmowska J.

autor

Paszkiewicz R.

autor

Tłaczała M.

• Wroclaw University of Technology, Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland

Bibliografia

• [1] Mahdjoub A., Zighed L., New designs for graded refractive index antireflection coatings, Thin Solid Films 478(1-2), 2005, pp. 299-304.
• [2] Pieters B.E., Zeman M., van Swaaij R.A.C.M.M., Metselaar W.J., Optimization of a-SiGe.H solar cells with graded intrinsic layers using integrated optical and electrical modeling, Thin Solid Films 451-452, 2004, pp. 294-7.
• [3] Wośko M., Paszkiewicz B., Piasecki T., Szyszka A., Paszkiewicz R., Tłaczala M., Applications of functional gradient materials in optoelectronic devices, Optica Applicata 35(3), 2005, pp. 663-7.
• [4] Wośko M., Paszkiewicz B., Piasecki T., Szyszka A., Paszkiewicz R., Tłaczala M., Application and modelling of functionally graded materials for optoelectronic devices, Proceedings of 2005 International Students and Young Scientists Workshop „Photonics and Microsystems", 2005, pp. 87-9.