Zhang Y, Islam Z, Ren Y, Parilla P A, Ahrenkiel S P, Lee P L, Mascarenhas A, McNevin M J, Naumov I, Fu H-X, Huang X-Y, Li J
National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401, USA.
Phys Rev Lett. 2007 Nov 23;99(21):215901. doi: 10.1103/PhysRevLett.99.215901. Epub 2007 Nov 19.
There are very few materials that exhibit zero thermal expansion (ZTE), and of these even fewer are appropriate for electronic and optoelectronic applications. We find that a multifunctional crystalline hybrid inorganic-organic semiconductor, beta-ZnTe(en)(0.5) (en denotes ethylenediamine), shows uniaxial ZTE in a very broad temperature range of 4-400 K, and concurrently possesses superior electronic and optical properties. The ZTE behavior is a result of compensation of contraction and expansion of different segments along the inorganic-organic stacking axis. This work suggests an alternative route to designing materials in a nanoscopic scale with ZTE or any desired positive or negative thermal expansion (PTE or NTE), which is supported by preliminary data for ZnTe(pda)(0.5) (pda denotes 1,3-propanediamine) with a larger molecule.
几乎没有材料表现出零热膨胀（ZTE），而其中适合电子和光电子应用的更是少之又少。我们发现一种多功能晶体杂化无机-有机半导体β-ZnTe(en)(0.5)（en表示乙二胺）在4-400K的非常宽的温度范围内表现出单轴ZTE，并且同时具有优异的电子和光学性质。ZTE行为是沿无机-有机堆积轴不同部分收缩和膨胀相互补偿的结果。这项工作为在纳米尺度设计具有ZTE或任何所需正热膨胀或负热膨胀（PTE或NTE）的材料提供了一条替代途径，这得到了具有更大分子的ZnTe(pda)(0.5)（pda表示1,3-丙二胺）的初步数据的支持。
