TY - JOUR
T1 - Van der Waals Epitaxial Growth for High Performance Organic-Free Perovskite Solar Cell
T2 - Experimental and Theoretical Insights
AU - Faheem, Muhammad Bilal
AU - Khan, Bilawal
AU - Feng, Chao
AU - Subhani, Waqas Siddique
AU - Mabrouk, Sally
AU - Sayyad, Muhammad Hassan
AU - Yildiz, Abdullah
AU - Zhang, Wen-Hua
AU - Qiao, Quinn
PY - 2022/7/12
Y1 - 2022/7/12
N2 - All-inorganic perovskite solar cells (PSCs) are most promising in yielding stabilized power conversion efficiencies (PCE) as compared to their hybrid organic–inorganic counterparts. However, all-inorganic PSCs have suffered from low efficiency due to significant charge carrier recombination within perovskite active layer (PAL) bulk and at the carrier selective interfaces (CSI). Boosting the PCE through the remedy to both issues seems to be the only Achilles-Heal on their way to commercialization. Here, a synergistic approach of liquid-exfoliated molybdenum disulfide (MoS2) at the PAL (CsPbIBr2)/hole transport layer (NiO) interface to enhance the perovskite grain growth and stabilize the hole transport layer (HTL)/PAL interface against the carrier recombination within the PAL bulk and at the interface is reported. The in-plane coupling between MoS2 crystal lattice and CsPbIBr2 is strongly revealed through transmission electron microscopy (TEM) results, which favored the van der Waals epitaxial growth of CsPbIBr2 PAL toward the larger crystalline grain sizes, preferential growth along (110), i.e., normal to MoS2, and low trap-density. Therefore, the PCE of organic-free CsPbIBr2 PSC is increased to as high as 10.98% under 1-sun illumination, which is 48% higher than the pristine device (7.38%), which concludes that this strategy can be integrated to other analogous perovskite compositions.
AB - All-inorganic perovskite solar cells (PSCs) are most promising in yielding stabilized power conversion efficiencies (PCE) as compared to their hybrid organic–inorganic counterparts. However, all-inorganic PSCs have suffered from low efficiency due to significant charge carrier recombination within perovskite active layer (PAL) bulk and at the carrier selective interfaces (CSI). Boosting the PCE through the remedy to both issues seems to be the only Achilles-Heal on their way to commercialization. Here, a synergistic approach of liquid-exfoliated molybdenum disulfide (MoS2) at the PAL (CsPbIBr2)/hole transport layer (NiO) interface to enhance the perovskite grain growth and stabilize the hole transport layer (HTL)/PAL interface against the carrier recombination within the PAL bulk and at the interface is reported. The in-plane coupling between MoS2 crystal lattice and CsPbIBr2 is strongly revealed through transmission electron microscopy (TEM) results, which favored the van der Waals epitaxial growth of CsPbIBr2 PAL toward the larger crystalline grain sizes, preferential growth along (110), i.e., normal to MoS2, and low trap-density. Therefore, the PCE of organic-free CsPbIBr2 PSC is increased to as high as 10.98% under 1-sun illumination, which is 48% higher than the pristine device (7.38%), which concludes that this strategy can be integrated to other analogous perovskite compositions.
KW - organic-free perovskite solar cells
KW - radiative recombination
KW - van der Waals epitaxy
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85131747501&origin=recordpage
U2 - 10.1002/admi.202200421
DO - 10.1002/admi.202200421
M3 - RGC 21 - Publication in refereed journal
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 20
M1 - 2200421
ER -
