Lithium intercalation and exfoliation of layered bismuth selenide and bismuth telluride

Towards higher thermoelectric performance of Bi2Te3 via defect engineering

“…The vdW gap can be somewhat regarded as a 2-D open-frame ''cage''. In Bi 2 Te 3 , intercalants can be Li, Cu, and Ba [7,38,39]. In the meantime, the vdW gap also facilities exfoliation [40].…”

“…Bi 2 Te 3 and its derivatives are a prime test bed for new materials synthesis and preparation methods, which directly or indirectly govern the type, amount, morphology, and topology of defect. While defects can be implemented in Bi 2 Te 3 by substitutional doping [3,4], ball milling [5], exfoliation [6], intercalation [7], and texturation [8], there generally lacks a one-to-one correspondence between a specific implementation procedure, a specific type of defect, and the impact on a specific TE property. More importantly, all three TE properties are inherently inter-dependent.…”

Layered bismuth selenide utilized as hole transporting layer for highly stable organic photovoltaics

“…Finally, the relatively large thin L-Bi 2 Se 3 plate can be obtained in aqueous solution. Zeta potential value of aqueous exfoliated Bi 2 Se 3 was over $50 mV, which indicated the surface potential could offer the large surface charge to avoid the nanoplates agglomeration [34]. Ultraviolet-visible (UV-Vis) absorption spectrum of Bi 2 Se 3 nanoplates suspended in water was depicted in Fig.…”

Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates

“…15,16 We note that accurate determination of molecular composition is a critical challenge and while techniques such as inductively coupled plasma mass spectrometry (ICP-MS) offer better than part per billion accuracy, the technique is designed for large volume samples with more than several mg in mass. 24 After growth, the samples were transferred to a suspended micro-thermometry test platform (Figure 1(b)) using an electrochemically sharpened probe. Transfer was performed in ambient conditions under an optical microscope.…”