1.55微米發光波段超微量摻雜稀土元素磷化銦鎵砷液相磊晶層之特性研究

Characterizations of 1.55μm-luminescent-wavelength InGaAsP layers grown from very lightly RE-treated solution

李振豪(Zeng-Hao Lee)

指導教授 ： 溫武義

中原大學/工學院/電子工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100093

摘要

自 1970 年以來，大家對四元III-V化合物半導體的研究漸感興趣，尤其是與InP晶格匹配的InGaAsP四元化合物。因為這些材料我們可以獨立地調整其晶格常數和能隙以符合我們的需求。
而近年來摻雜稀土元素(Rare-Earth)於III-V化合物半導體的研究，對於提昇光電元件之特性扮演著很重要的角色；此乃由於稀土元素對氧以及其他VI族的元素有極強的親和力，因此有吸附雜質以降低背景濃度之效果，有助於提昇光電元件之特性。
在本論文中，我們以液相磊晶法在磷化銦基板上成長發光波段為1.55微米的磷化銦鎵砷磊晶層，並摻雜不同的稀土元素鈥（Ho）、釹(Nd)、鐿(Yb)來吸附雜質並降低背景濃度。
在磊晶層的特性量測方面，光激螢光(PL)和霍爾量測都顯示出摻雜稀土元素後對磊晶層的品質和載子濃度均有改善，而當鐿(Yb)的摻雜量為0.06565wt%時，有最窄的半高波寬(FWHM)和最低的載子濃度。
最後，我們將未摻雜和摻雜稀土元素的磊晶層研製PIN光檢測器並加以比較，結果仍顯示出摻雜鐿(Yb)為0.06565wt%時，有較佳的元件特性。

關鍵字

稀土元素 ； 磷化銦鎵砷 ； 液相磊晶

並列摘要

In the mid-1970s, the interest in quaternary III-V semiconductor materials began to flourish, particularly in the InGaAsP lattice matched to InP. These materials give independent control of lattice parameter and bandgap (and other material properties).
Rare-Earth (RE) treated III-V compound semiconductors have been of great interest recently. The RE elements have a strong affinity to oxygen and other group VI elements, the effect can be used to perform effective gettering of the background donors and acceptors in III-V semiconductors.
In this study, we grow 1.55μm- luminescent-wavelength InGaAsP on the InP substrate by liquid phase epitaxy(LPE) and add different rare-earth elements(Ho, Nd and Yb) into the growth solution to reduce the background concentration.
Characterizations of InGaAsP epilayers by PL and Hall measurements indicate that both electrical and optical qualities of epilayers are improved by rare-earth treatment. The narrowest FWHM of PL spectrum and the lowest carrier concentration can be obtained from the case of Yb-treatment with Yb adding amount of 0.06565wt%.
Finally, we fabricate PIN photodiodes on undoped and Yb-treated InGaAsP epilayers. Better device properties are still obtained from the same condition as above, namely, carrying out the LPE growth with Yb-treatment, particularly, adding the amount of Yb to higher than 0.06565wt%.

並列關鍵字

InGaAsP ； rare-earth element ； LPE

參考文獻

[3] G. A. Antypas and R. L. Moon, J. Electrochem. Soc 120, 1574 (1973)

[4] R. Sankaran ,R.L.Moon, and G.A. Anytypas, J. Cryst. Growth 33, 271(1974)

[5] M. Feng, T. H. Windhorn, M. M. Tashima, and G.E. Stillman, A. P. L. 32,758 (1978)

[7] G. A. Antypas and J. Edgecumbe, J. Cryst. Growth 34, 132(1976)

[8] J. J. Coleman, W. R. Hitchens, N. Holonyak, Jr, and M. J. Ludowise, A. P. L. 25, 725 (1974)