| Autor: |
Shah, Shruti, Punde, Ashvini, Kale, Dhanashri, Hase, Yogesh, Ladhane, Somnath, Rahane, Swati, Doiphode, Vidya, Shinde, Pratibha, Waghmare, Ashish, Bade, Bharat, Rondiya, Sachin, Prasad, Mohit, Patole, Shashikant P., Jadkar, Sandesh |
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| Zdroj: |
Advanced Electronic Materials; Sep2024, Vol. 10 Issue 9, p1-14, 14p |
| Abstrakt: |
Solution‐processed inorganic perovskites cause chemical and structural defects unfavorable for photodetector application. Using a binary solvent, defects in CsPbIxBry (CPIB) perovskite are passivated with poly 4‐vinylpyridine (PVP) and Poly methyl methacrylate (PMMA) polymers. X‐ray photoelectron spectroscopy and FTIR spectra reveal a Lewis base‐acid interaction between Pb2+ and polymer, confirming the passivation of CPIB perovskite. Scanning electron microscopy analysis shows a dual‐surface morphology with microribbons and microcrystals in perovskites. After PMMA treatment, CPIB perovskite exhibits a blue shift in the bandgap (1.8 to 1.95 eV), while the PVP induced a redshift, reducing the bandgap to 1.7 eV. Blue shift in PL analysis indicates modification of grain boundaries. A higher lifetime obtained for CPIB/PVP confirms the restraint of non‐radiative recombinations. Photodetectors are fabricated with pristine CPIB, CPIB/PVP, and CPIB/PMMA perovskites. The passivated CPIB/PVP‐based photodetector exhibits a quick rise time of ≈23 ms and a decay time of ≈17 ms. It also demonstrates a remarkable photoresponsivity of 23 mA W−1, an internal quantum efficiency of 4.9%, and a detectivity of 15.0 × 1010 Jones at 10 mW cm−2 light intensity. This approach shows the potential for environmentally stable polymers to passivate inorganic perovskites for high photodetection performance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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