In:
Small, Wiley, Vol. 18, No. 21 ( 2022-05)
Abstract:
Ti 3 C 2 T x , as a newly investigated 2D material, has gained great attention owing to its metallic conductivity, tunable work function ( W F ), and unique electrical property. However, its W F can be further adjusted to meet the needs of optoelectronic devices. Here, surface‐engineered Ti 3 C 2 T x is fabricated with tunable W F by treating with ethanolamine and rhodium chloride (RhCl 3 ). Ethanolamine treated Ti 3 C 2 T x can induce the chemical adsorption of NH 2 on Ti 3 C 2 T x with hydrogen‐bonding, which causes the decreased W F , while chemical doping with RhCl 3 leads to the improvement of W F , which is achieved by the downshift of Femi level of Ti 3 C 2 T x . Moreover, the ethanolamine and RhCl 3 can effectively passivate the vacancies of Ti. As such, the surface‐engineered Ti 3 C 2 T x is more suitable as buffer layer for polymer solar cells (PSCs) by enhancing the interfacing characteristics of the Ti 3 C 2 T x /active layer. The PSCs with engineered Ti 3 C 2 T x for electron or hole transport layers can exhibit a power conversion efficiency of 15.88% or 15.54%. These efficiencies can be compared with those of devices with a conventional transport layer. This work provides a facile strategy to realize the work function tunability of Ti 3 C 2 T x , and also shows that the tuned Ti 3 C 2 T x has a certain application prospect in photovoltaic devices.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202201046
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2168935-0
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