TY - JOUR
T1 - Inside Perovskites: Quantum Luminescence from Bulk Cs4PbBr6 Single Crystals
AU - de Bastiani, Michele
AU - Dursun, Ibrahim
AU - Zhang, Yuhai
AU - Alshankiti, Buthainah
AU - Miao, Xiaohe
AU - Yin, Jun
AU - Yengel, Emre
AU - Alarousu, Erkki
AU - Turedi, Bekir
AU - Almutlaq, Jawaher
AU - Saidaminov, Makhsud I.
AU - Mitra, Somak
AU - Gereige, Issam
AU - Alsaggaf, Ahmed
AU - Zhu, Yihan
AU - Han, Yu
AU - Roqan, Iman S.
AU - Bredas, Jean-Luc
AU - Mohammed, Omar F.
AU - Bakr, Osman
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors acknowledge the financial support of KAUST and Saudi Aramco (Grant RGC/3/3095-01).
PY - 2017/8/22
Y1 - 2017/8/22
N2 - Zero-dimensional perovskite-related structures (0D-PRS) are a new frontier of perovskite-based materials. 0D-PRS, commonly synthesized in powder form, manifest distinctive optical properties such as strong photoluminescence (PL), narrow emission linewidth, and high exciton binding energy. These properties make 0D-PRS compelling for several types of optoelectronic applications, including phosphor screens and electroluminescent devices. However, it would not be possible to rationally design the chemistry and structure of these materials, without revealing the origins of their optical behaviour, which is contradictory to the well-studied APbX3 perovskites. In this work, we synthesize single crystals of Cs4PbBr6 0D-PRS, and investigated the origins of their unique optical and electronic properties. The crystals exhibit a PL quantum yield higher than 40%, the highest reported for perovskite-based single crystals. Time-resolved and temperature dependent PL studies, supported by DFT calculations, and structural analysis, elucidate an emissive behaviour reminiscent of a quantum confined structure rather than a typical bulk perovskite material.
AB - Zero-dimensional perovskite-related structures (0D-PRS) are a new frontier of perovskite-based materials. 0D-PRS, commonly synthesized in powder form, manifest distinctive optical properties such as strong photoluminescence (PL), narrow emission linewidth, and high exciton binding energy. These properties make 0D-PRS compelling for several types of optoelectronic applications, including phosphor screens and electroluminescent devices. However, it would not be possible to rationally design the chemistry and structure of these materials, without revealing the origins of their optical behaviour, which is contradictory to the well-studied APbX3 perovskites. In this work, we synthesize single crystals of Cs4PbBr6 0D-PRS, and investigated the origins of their unique optical and electronic properties. The crystals exhibit a PL quantum yield higher than 40%, the highest reported for perovskite-based single crystals. Time-resolved and temperature dependent PL studies, supported by DFT calculations, and structural analysis, elucidate an emissive behaviour reminiscent of a quantum confined structure rather than a typical bulk perovskite material.
UR - http://hdl.handle.net/10754/625296
UR - http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.7b02415
UR - http://www.scopus.com/inward/record.url?scp=85029302835&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.7b02415
DO - 10.1021/acs.chemmater.7b02415
M3 - Article
SN - 0897-4756
VL - 29
SP - 7108
EP - 7113
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 17
ER -