CsPbBr₃/SiO₂ GIBRID KOMPOZITSIYALARIDA SIRT PASSIVATSIYASI VA OPTIK XOSSALARNING SHAKLLANISH MEXANIZMLARI: QIYOSIY TAHLIL
DOI:
https://doi.org/10.47390/ydif-y2026v2i18/n01Kalit so‘zlar:
CsPbBr₃, SiO₂, perovskit kvant nuqtalari, sirt passivatsiyasi, PLQY, PL lifetime, rekombinatsiya, nanokonfinement, optik barqarorlik.Annotasiya
Ishda CsPbBr₃/SiO₂ gibrid kompozitsiyalarida sirt passivatsiyasi, tashuvchi rekombinatsiyasi va optik barqarorlik o‘rtasidagi bog‘lanish qiyosiy tahlil qilindi. Tahlil uchun CsPbBr₃ nanokristallarining SiO₂ qobiq, mezog‘ovak matritsa va funksionallashtirilgan silika bilan gibridlangan tizimlariga oid eksperimental ishlarning PL maksimumi, FWHM, fotoluminessensiya kvant chiqishi (PLQY), vaqt bo‘yicha so‘nish (PL lifetime) va muhit barqarorligi ko‘rsatkichlari solishtirildi. Natijalar SiO₂ ning ta’siri faqat fizik to‘siq hosil qilish bilan cheklanmasligini, balki sirt tuzoq holatlari zichligini kamaytirish va nurlanishsiz rekombinatsiya kanallarini susaytirish orqali tashuvchi dinamikasini o‘zgartirishini ko‘rsatadi. Mezog‘ovak SiO₂ dagi nanokonfinement PLQY ni 89 ± 10% gacha, funksionallashtirilgan silika va qo‘shimcha SiO₂ qobig‘i esa 90% gacha yetkazishi qayd etilgan. Ayrim CsPbBr₃/SiO₂ heterotuzilmalarda PL lifetime ning ~40,5 ns gacha uzayishi sirt tuzoqlarining passivatsiyasi bilan mos keladi. Shu bilan birga, SiO₂ qatlami zaryad tashuvchilar transportiga qo‘shimcha qarshilik kiritishi mumkin. Demak, optimal kompozitsiya luminessensiya samaradorligi, barqarorlik va zaryad transporti o‘rtasidagi muvozanat bilan belgilanadi.
Manbalar
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