TY - JOUR
T1 - Domain-Size-Dependent Residual Stress Governs the Phase-Transition and Photoluminescence Behavior of Methylammonium Lead Iodide
AU - Lee, Kwangjae
AU - Turedi, Bekir
AU - Giugni, Andrea
AU - Lintangpradipto, Muhammad Naufal
AU - Zhumekenov, Ayan A.
AU - Alsalloum, Abdullah
AU - Min, Jung-Hong
AU - Dursun, Ibrahim
AU - Naphade, Rounak
AU - Mitra, Somak
AU - Roqan, Iman S.
AU - Ooi, Boon S.
AU - Mohammed, Omar F.
AU - Di Fabrizio, Enzo M.
AU - Cho, Namchul
AU - Bakr, Osman
N1 - KAUST Repository Item: Exported on 2021-02-16
Acknowledgements: K.J.L., B.T., and A.G. contributed equally to this work. The authors gratefully acknowledge the financial support provided by King Abdullah University of Science and Technology (KAUST). This work was also supported by the Soonchunhyang University Research Fund.
PY - 2021/2/11
Y1 - 2021/2/11
N2 - Methylammonium lead iodide (MAPbI3) perovskite has garnered significant interest as a versatile material for optoelectronic applications. The temperature-dependent photoluminescence (TDPL) and phase-transition behaviors revealed in previous studies have become standard indicators of defects, stability, charge carrier dynamics, and device performance. However, published reports abound with examples of irregular photoluminescence and phase-transition phenomena that are difficult to reconcile, posing major challenges in the correlation of those properties with the actual material state or with the subsequent device performance. In this paper, a unifying explanation for the seemingly inconsistent TDPL and phase-transition (orthorhombic-to-tetragonal) characteristics observed for MAPbI3 is presented. By investigating MAPbI3 perovskites with varying crystalline states, ranging from polycrystal to highly oriented crystal as well as single-crystals, key features in the TDPL and phase-transition behaviors are identified that are related to the extent of crystal domain-size-dependent residual stress and stem from the considerable volume difference (ΔV ≈ 4.5%) between the primitive unit cells of the orthorhombic (at 80 K) and tetragonal phases (at 300 K) of MAPbI3. This fundamental connection is essential for understanding the photophysics and material processing of soft perovskites.
AB - Methylammonium lead iodide (MAPbI3) perovskite has garnered significant interest as a versatile material for optoelectronic applications. The temperature-dependent photoluminescence (TDPL) and phase-transition behaviors revealed in previous studies have become standard indicators of defects, stability, charge carrier dynamics, and device performance. However, published reports abound with examples of irregular photoluminescence and phase-transition phenomena that are difficult to reconcile, posing major challenges in the correlation of those properties with the actual material state or with the subsequent device performance. In this paper, a unifying explanation for the seemingly inconsistent TDPL and phase-transition (orthorhombic-to-tetragonal) characteristics observed for MAPbI3 is presented. By investigating MAPbI3 perovskites with varying crystalline states, ranging from polycrystal to highly oriented crystal as well as single-crystals, key features in the TDPL and phase-transition behaviors are identified that are related to the extent of crystal domain-size-dependent residual stress and stem from the considerable volume difference (ΔV ≈ 4.5%) between the primitive unit cells of the orthorhombic (at 80 K) and tetragonal phases (at 300 K) of MAPbI3. This fundamental connection is essential for understanding the photophysics and material processing of soft perovskites.
UR - http://hdl.handle.net/10754/667410
UR - https://onlinelibrary.wiley.com/doi/10.1002/adfm.202008088
U2 - 10.1002/adfm.202008088
DO - 10.1002/adfm.202008088
M3 - Article
SN - 1616-301X
SP - 2008088
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -