TY - JOUR
T1 - In Situ Epitaxial Quantum Dot Passivation Enables Highly Efficient and Stable Perovskite Solar Cells
AU - Alzahrani, Yahya A.
AU - Alqahtani, Raghad M.
AU - Alqarni, Raghad A.
AU - Alnakhli, Jenan R.
AU - Anezi, Shahad A.
AU - Almalki, Ibtisam S.
AU - Yafi, Ghazal S.
AU - Alenzi, Sultan M.
AU - Aljuwayr, Abdulaziz
AU - Alessa, Abdulmalik M.
AU - Alkhaldi, Huda
AU - Alanazi, Anwar Q.
AU - Almalki, Masaud
AU - Alkahtani, Masfer H.
N1 - Publisher Copyright:
© 2025 by the authors.
PY - 2025/7
Y1 - 2025/7
N2 - We report an advanced passivation strategy for perovskite solar cells (PSCs) by introducing core–shell structured perovskite quantum dots (PQDs), composed of methylammonium lead bromide (MAPbBr3) cores and tetraoctylammonium lead bromide (tetra-OAPbBr3) shells, during the antisolvent-assisted crystallization step. The epitaxial compatibility between the PQDs and the host perovskite matrix enables effective passivation of grain boundaries and surface defects, thereby suppressing non-radiative recombination and facilitating more efficient charge transport. At an optimal PQD concentration of 15 mg/mL, the modified PSCs demonstrated a remarkable increase in power conversion efficiency (PCE) from 19.2% to 22.85%. This enhancement is accompanied by improved device metrics, including a rise in open-circuit voltage (Voc) from 1.120 V to 1.137 V, short-circuit current density (Jsc) from 24.5 mA/cm2 to 26.1 mA/cm2, and fill factor (FF) from 70.1% to 77%. Spectral response analysis via incident photon-to-current efficiency (IPCE) revealed enhanced photoresponse in the 400–750 nm wavelength range. Additionally, long-term stability assessments showed that PQD-passivated devices retained more than 92% of their initial PCE after 900 h under ambient conditions, outperforming control devices which retained ~80%. These findings underscore the potential of in situ integrated PQDs as a scalable and effective passivation strategy for next-generation high-efficiency and stable perovskite photovoltaics.
AB - We report an advanced passivation strategy for perovskite solar cells (PSCs) by introducing core–shell structured perovskite quantum dots (PQDs), composed of methylammonium lead bromide (MAPbBr3) cores and tetraoctylammonium lead bromide (tetra-OAPbBr3) shells, during the antisolvent-assisted crystallization step. The epitaxial compatibility between the PQDs and the host perovskite matrix enables effective passivation of grain boundaries and surface defects, thereby suppressing non-radiative recombination and facilitating more efficient charge transport. At an optimal PQD concentration of 15 mg/mL, the modified PSCs demonstrated a remarkable increase in power conversion efficiency (PCE) from 19.2% to 22.85%. This enhancement is accompanied by improved device metrics, including a rise in open-circuit voltage (Voc) from 1.120 V to 1.137 V, short-circuit current density (Jsc) from 24.5 mA/cm2 to 26.1 mA/cm2, and fill factor (FF) from 70.1% to 77%. Spectral response analysis via incident photon-to-current efficiency (IPCE) revealed enhanced photoresponse in the 400–750 nm wavelength range. Additionally, long-term stability assessments showed that PQD-passivated devices retained more than 92% of their initial PCE after 900 h under ambient conditions, outperforming control devices which retained ~80%. These findings underscore the potential of in situ integrated PQDs as a scalable and effective passivation strategy for next-generation high-efficiency and stable perovskite photovoltaics.
KW - core–shell structure
KW - epitaxial passivation
KW - perovskite quantum dots (PQDs)
KW - perovskite solar cells (PSCs)
KW - photovoltaic performance enhancement
UR - https://www.scopus.com/pages/publications/105010604168
U2 - 10.3390/nano15130978
DO - 10.3390/nano15130978
M3 - Article
AN - SCOPUS:105010604168
SN - 2079-4991
VL - 15
JO - Nanomaterials
JF - Nanomaterials
IS - 13
M1 - 978
ER -
