UPSI Digital Repository (UDRep)
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Abstract : Universiti Pendidikan Sultan Idris |
Kajian ini bertujuan untuk melakukan pencirian morfologi, optik dan struktur bagi
mengkaji kehadiran partikel-partikel nano CdS dan CdSe yang tertanam di antara
matriks P3HT peranti filem nipis hibrid organik dan tak organik menggunakan teknik
Pemendapan Angkutan Sudut (ALD) dan kaedah dedahan gas yang mudah, cepat dan
berkos rendah. Penyelidikan bermula dengan menentukan kesan kehadiran ion Cd2+
dalam larutan P3HT, asid stearik (SA) dan P3HT:SA yang dicirikan dengan isoterma
tekanan permukaan-luas yang dikawal oleh komputer. Peranti filem nipis disediakan
dengan memendapkan P3HT, SA dan ion Cd2+ (dalam kemolaran 0.5 dan 1.0 mM
CdCl2) ke atas substrat silikon dan kuarza menggunakan teknik ALD dan dedahan
kepada gas H2S atau H2Se selama 2, 4, 6 dan 15 jam. Peranti filem nipis organik-tak
organik dicirikan menggunakan FESEM, EDX, AFM, spektroskopi Raman dan UVVis.
Pencirian isoterma tekanan permukaan-luas menunjukkan purata keluasan dan
saiz molekul P3HT, SA dan P3HT:SA meningkat dengan peningkatan ion Cd2+.
Pembentukan partikel-partikel nano berjaya ditanam di antara matriks P3HT dengan
menggunakan kedua-dua kaedah seperti yang disahkan oleh keputusan FESEM, EDX
dan AFM. Pencirian Raman menunjukkan anjakan puncak ke nombor gelombang
lebih rendah apabila tempoh dedahan meningkat, menunjukkan peningkatan dalam
kristalografi polimer P3HT dan perlanjutan panjang konjugasi yang berkesan di
sepanjang tulang belakang polimer. Pencirian optik UV-Vis menunjukkan nilai tenaga
lebar jalur adalah antara 1.87 sehingga 1.91 eV. Sebagai kesimpulan, hasil pencirian
morfologi, optik dan struktur menunjukkan kehadiran partikel-partikel nano CdS atau
CdSe yang tertanam di antara matriks P3HT menggunakan kaedah ALD dan dedahan
gas. Polimer hibrid terbaik ialah P3HT:CdS dalam kemolaran 0.5 mM CdCl2 yang
didedahkan selama 6 jam. Kajian ini memberi implikasi bahawa teknik pemendapan
ALD dan dedahan gas adalah praktikal untuk menghasilkan peranti hibrid
nanokomposit organik-tak organik berkos rendah. |
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