英语翻译These ZT values outperform that of \x020.9 at 923 K for n-type PbS0.98Cl0.02 with nanostructured1%Bi2S3,34 and are much higher than the ZT values of simple solid solution samples at 923 K of 0.9 and 0.6 for p-type Pb0.975Na0.025S54 and n-

英语翻译These ZT values outperform that of \x020.9 at 923 K for n-type PbS0.98Cl0.02 with nanostructured1%Bi2S3,34 and are much higher than the ZT values of simple solid solution samples at 923 K of 0.9 and 0.6 for p-type Pb0.975Na0.025S54 and n-
英语翻译
These ZT values outperform that of \x020.9 at 923 K for n-type PbS0.98Cl0.02 with nanostructured
1%Bi2S3,34 and are much higher than the ZT values of simple solid solution samples at 923 K of 0.9 and 0.6 for p-type Pb0.975Na0.025S54 and n-type PbS0.98Cl0.02 respectively.15
Matrix/precipitate band alignment（标题）
Up to this point the discussion primarily focused on strategies to reduce the lattice thermal conductivity through broad-based phonon scattering across multiple length scales.In all these
cases,however,the power factor is actually reduced relative to the single phase parent material because the nano-inclusions increase carrier scattering.This lowers the carrier mobilities
and results in a suboptimal power factor.Therefore,there is obviously room for even higher ZTs and the continuing challenge in developing such materials is to avoid this carrier
mobility deterioration.Previously,epitaxial superlattice thin lms of Bi2Te3/Sb2Te3 were claimed to be capable of allowing carriers to transmit via small band offsets while reducing the thermal conductivity by acoustic mismatch between the superlattice components.71 A strategy targeting the control and
minimization of band offsets (between two phases) can now also be realized in bulk systems.If the conduction bands of the matrix are close in energy with those of the second phase then
electron transmission through the system should be more facile.

英语翻译These ZT values outperform that of \x020.9 at 923 K for n-type PbS0.98Cl0.02 with nanostructured1%Bi2S3,34 and are much higher than the ZT values of simple solid solution samples at 923 K of 0.9 and 0.6 for p-type Pb0.975Na0.025S54 and n-
这些ZT值优于带有纳米结构化的1%Bi2S3[34]的n型PbS0.98Cl0.02在923 K时0.9的值,并且大大高于简单的固态溶液样品在923K下的ZT值,即对 p型Pb0.975Na0.025S54和n型PbS0.98Cl0.02分别为0.9和0.6.[15]
基体/沉淀物价带的对准（标题）
到现在为止,讨论主要集中在通过跨多个尺度范围的广泛基础上的声子分散来降低晶格热导率的策略上.可是,在所有这些情况下,功率因数实际上是相对于单相母体材料降低的,因为纳米夹杂物使载流子的分散增加了.这就降低了载流子的迁移率并导致并不最理想的功率因数.
因此,显然存在更高ZT值的空间,而开发这类材料的不断挑战是如何避免这一载流子迁移率的恶化.此前,Bi2Te3/ Sb2Te3的外延超晶格薄膜据称能够使载流子通过小的价带偏移而传输,同时通过超晶格成分之间的声失配而降低热导率.[71]旨在使（两个相之间的）价带偏移得以控制和最小化的策略现在也可以在块状系统中实现了.如果基体的导带在能量上与所述的第二相的导带很接近,那么,通过该系统的电子传输应该更加容易.