Investigation Of Structural And Electro-Optic Properties Of Cs3Bi2I9 Perovskite Thin Films

Şen E., Aldemir D. A., Kaleli M.

III National and I. International Nanotechnology and Polymer Days (UNIPG 2025), Isparta, Türkiye, 25 - 27 Haziran 2025, ss.52, (Özet Bildiri)

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Isparta
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.52
  • Süleyman Demirel Üniversitesi Adresli: Evet

Özet

HalZde perovskZtes, exhZbZtZng exceptZonal optoelectronZc propertZes, have rapZdly achZeved solar cell effZcZencZes exceedZng 27

%. TheZr 3D AMX3 structure (A = Cs+, MA+, or FA+; M = Sn2+ or Pb2+; X = Cl-, Br-, or I-) comprZses corner-sharZng MX6

octahedra wZth A catZons occupyZng the ZnterstZtZal sZtes. However, the toxZcZty of Pb and Zts low stabZlZty Zn humZd and hot

condZtZons have led to extensZve research Znto composZtZonal and structural modZfZcatZons, resultZng Zn the development of

varZous perovskZte-lZke structures. Double perovskZtes (A2MⅠ MⅢX6) and trZvalent metal (M) based perovskZtes (A3M2X9) have

garnered sZgnZfZcant Znterest Zn thZs regard. In perovskZte materZals, metal and metalloZd catZons such as BZ3+, Sn2+, Ge2+ and

Sb³⁺ are often preferred Znstead of lead. The non-toxZcZty of metal Zons Zs Zmportant for the envZronment and health, and

ZncreasZng the stabZlZty of the perovskZte structure provZdes long lZfe and hZgh effZcZency Zn solar cells. SZnce the ZnstabZlZty and

moZsture sensZtZvZty of perovskZtes reduce power conversZon effZcZency (PCE), bZsmuth (BZ) metal, whZch Zs abundant, nontoxZc, and used Zn varZous applZcatZons, Zs used Znstead of lead. In thZs study, perovskZte Znk prepared wZth BZsmuth ZodZde (BZI3)

salt and CesZum ZodZde (CsI) ZnorganZc halZde was deposZted on TZO2 coated-glass by the UltrasonZc Spray PyrolysZs (USP)

method, and Cs3BZ2I9 perovskZte thZn fZlm was formed by annealZng the structure. Structural, elemental, and electro-optZcal

analyses of the perovskZtes were studZed wZth XRD, EDS, and UV-VIS systems. The crystallZte sZze of the fZlm was calculated

as 75 nm from the XRD pattern. PerovskZte thZn-fZlm band gaps (Eg) were determZned from Tauc plots. The dZrect and ZndZrect

band gaps of the Cs3BZ2I9 perovskZte thZn fZlm, calculated from the Tauc method, are 1.83 eV and 1.77 eV, respectZvely.