Journal of Semiconductors, Volume. 45, Issue 10, 102302(2024)
Structure and electrical properties of polysilicon films doped with ammonium tetraborate tetrahydrate
Fig. 2. (Color online) Raman spectra and the corresponding deconvolution peaks of 150 nm silicon film (a) deposited by magnetic sputtering (p:a-Si), (b) annealed directly at 950 °C for 45 min (pPoly film), and (c) annealed with spin-coated ATT at 950 °C for 45 min (ATT-pPoly film). (d) XRD patterns of the three samples.
Fig. 3. (Color online) Effect of ATT on the average grain size (δ). (a) Particle size obtained through log-normal and Gaussian distributions. Inset: a typical SEM image of the annealed polysilicon film; (b) the average grain size δ of pPoly and ATT-pPoly films annealed at 950 °C for 45 min under different sputtering thickness (d).
Fig. 4. (Color online) Electrical properties of the p:poly-Si films vs. deposition thickness (d). (a) Resistivity (ρ), (b) carrier concentration (p*), and (c) carrier mobility (μ).
Fig. 5. (Color online) Mean sheet resistance (Rsheet,m) and the corresponding standard deviation coefficient (σ) vs. annealing temperature of the samples annealed for 45 min. The silicon films shown in (a) are deposited at a pressure of 0.2 Pa, and the samples in (b) are deposited at 0.5 Pa. The curves in (c) and (d) show uniformity.
Fig. 6. (Color online) Mean sheet resistance (Rsheet,m) and the corresponding standard deviation coefficient (σ) vs. annealing duration at 900 °C. The silicon films shown in (a) are deposited at a pressure of 0.2 Pa and the sample in (b) is deposited at 0.5 Pa. The curves in (c) and (d) show uniformity.
Fig. 7. (Color online) Boron concentration distribution in p:poly-Si films (annealed at 950 °C for 45 min) measured by SIMS.
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Yehua Tang, Yuchao Wang, Chunlan Zhou, Ke-Fan Wang. Structure and electrical properties of polysilicon films doped with ammonium tetraborate tetrahydrate[J]. Journal of Semiconductors, 2024, 45(10): 102302
Category: Research Articles
Received: Mar. 23, 2024
Accepted: --
Published Online: Dec. 5, 2024
The Author Email: Zhou Chunlan (CLZhou), Wang Ke-Fan (KFWang)