Abstract
2D layered hybrid organic-inorganic perovskites (HOIPs) have demonstrated improved stability and promising photovoltaic performance. The mechanical properties of such functional materials are both fundamentally and practically important to achieve both high performance and mechanical stable (flexible) devices. Here we report the mechanical properties of a series of 2D layered lead iodide HOIPs and investigate the role of structural sub-units (e.g., variation of the length of the organic spacer molecules -R and the number of inorganic layer -n) on the mechanical properties. While 2D HOIPs have much lower nominal elastic moduli and hardness than 3D HOIPs, larger n number and shorter R lead to stiffer materials. DFT simulations showed a similar trend to the experimental results. We compared these findings with other 2D layered crystals and shed light on routes to further tune the out-of-plane mechanical properties of 2D layered HOIPs.
| Original language | English |
|---|---|
| Journal | ACS Applied Materials and Interfaces |
| DOIs | |
| Publication status | Accepted/In press - Mar 29 2018 |
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ASJC Scopus subject areas
- Materials Science(all)
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Out-of-Plane Mechanical Properties of 2D Hybrid Organic-Inorganic Perovskites by Nanoindentation. / Tu, Qing; Spanopoulos, Ioannis; Hao, Shiqiang; Wolverton, Chris; Kanatzidis, Mercouri G; Shekhawat, Gajendra S.; Dravid, Vinayak P.
In: ACS Applied Materials and Interfaces, 29.03.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Out-of-Plane Mechanical Properties of 2D Hybrid Organic-Inorganic Perovskites by Nanoindentation
AU - Tu, Qing
AU - Spanopoulos, Ioannis
AU - Hao, Shiqiang
AU - Wolverton, Chris
AU - Kanatzidis, Mercouri G
AU - Shekhawat, Gajendra S.
AU - Dravid, Vinayak P.
PY - 2018/3/29
Y1 - 2018/3/29
N2 - 2D layered hybrid organic-inorganic perovskites (HOIPs) have demonstrated improved stability and promising photovoltaic performance. The mechanical properties of such functional materials are both fundamentally and practically important to achieve both high performance and mechanical stable (flexible) devices. Here we report the mechanical properties of a series of 2D layered lead iodide HOIPs and investigate the role of structural sub-units (e.g., variation of the length of the organic spacer molecules -R and the number of inorganic layer -n) on the mechanical properties. While 2D HOIPs have much lower nominal elastic moduli and hardness than 3D HOIPs, larger n number and shorter R lead to stiffer materials. DFT simulations showed a similar trend to the experimental results. We compared these findings with other 2D layered crystals and shed light on routes to further tune the out-of-plane mechanical properties of 2D layered HOIPs.
AB - 2D layered hybrid organic-inorganic perovskites (HOIPs) have demonstrated improved stability and promising photovoltaic performance. The mechanical properties of such functional materials are both fundamentally and practically important to achieve both high performance and mechanical stable (flexible) devices. Here we report the mechanical properties of a series of 2D layered lead iodide HOIPs and investigate the role of structural sub-units (e.g., variation of the length of the organic spacer molecules -R and the number of inorganic layer -n) on the mechanical properties. While 2D HOIPs have much lower nominal elastic moduli and hardness than 3D HOIPs, larger n number and shorter R lead to stiffer materials. DFT simulations showed a similar trend to the experimental results. We compared these findings with other 2D layered crystals and shed light on routes to further tune the out-of-plane mechanical properties of 2D layered HOIPs.
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U2 - 10.1021/acsami.8b05138
DO - 10.1021/acsami.8b05138
M3 - Article
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
ER -