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具有增强稳定性的无卤胍基钙钛矿太阳能电池。

Halogen-free guanidinium-based perovskite solar cell with enhanced stability.

作者信息

Chandra Deb Nath Narayan, Yoo Kicheon, Lee Jae-Joon

机构信息

Department of Energy & Materials Engineering, Research Center for Photoenergy Harvesting & Conversion Technology (phct), Dongguk University Seoul 100-715 Republic of Korea

出版信息

RSC Adv. 2018 May 14;8(31):17365-17372. doi: 10.1039/c8ra00639c. eCollection 2018 May 9.

DOI:10.1039/c8ra00639c
PMID:35539246
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9080437/
Abstract

Herein, we report a new halogen-free and excellent stable perovskite, GAPb(SCN), which was prepared from the symmetric guanidinium cation (GA) with nearly zero dipole moment, and pseudohalogen (SCN), for the fabrication of stable perovskite solar cells. GAPb(SCN) exhibits an orthorhombic crystal phase, with optical band gap of 1.43 eV. The orthorhombic crystal phase shifted to a cubic phase, due to the formation of PbS beyond 150 °C. GAPb(SCN) itself showed excellent stability upon being exposed to ambient conditions for 30 days, without degradation of its optical or crystallographic properties. This superior stability could be attributable to the strong electrostatic interaction between SCN and Pb, and hydrogen bonding between SCN and GA. Even though it has a suitable band gap, it exhibited a significantly lower efficiency of 0.11%. The very low performance could be attributable to the significantly low light absorption coefficient, and large non-radiative recombination of photo-induced charges an oxidized form of S at the TiO/perovskite interface.

摘要

在此，我们报道了一种新型的无卤且稳定性优异的钙钛矿GAPb(SCN)，它由偶极矩近乎为零的对称胍阳离子(GA)和拟卤素(SCN)制备而成，用于制造稳定的钙钛矿太阳能电池。GAPb(SCN)呈现正交晶相，光学带隙为1.43 eV。由于在150℃以上形成了PbS，正交晶相转变为立方相。GAPb(SCN)在暴露于环境条件30天后自身表现出优异的稳定性，其光学或晶体学性质没有降解。这种卓越的稳定性可归因于SCN与Pb之间的强静电相互作用以及SCN与GA之间的氢键。尽管它具有合适的带隙，但其效率显著较低，仅为0.11%。极低的性能可归因于极低的光吸收系数以及光生电荷在TiO/钙钛矿界面处与S的氧化形式发生的大量非辐射复合。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/3ffbfde4b895/c8ra00639c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/d1bffb3ae536/c8ra00639c-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/a0f7097f96a2/c8ra00639c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/3ffbfde4b895/c8ra00639c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/d1bffb3ae536/c8ra00639c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/6acdf6da4a56/c8ra00639c-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/29538e629ab1/c8ra00639c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/b352bd0e5b24/c8ra00639c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/28a94cdd2bf1/c8ra00639c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/a0f7097f96a2/c8ra00639c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0615/9080437/3ffbfde4b895/c8ra00639c-f8.jpg

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本文引用的文献

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Sulfur-Doped Carbon with Enlarged Interlayer Distance as a High-Performance Anode Material for Sodium-Ion Batteries.层间距扩大的硫掺杂碳作为钠离子电池的高性能负极材料
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Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency.
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