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Title: Single Crystal Microwires of p-DTS(FBTTh2)2 and Their Use in the Fabrication of Field-Effect Transistors and Photodetectors

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [1];  [3];  [4]; ORCiD logo [5];  [3]; ORCiD logo [3]
  1. Beijing JiaoTong Univ., Beijing (China)
  2. Univ. of California, Santa Barbara, CA (United States); Hunan Univ., Changsha (China)
  3. Univ. of California, Santa Barbara, CA (United States)
  4. Skolkovo Institute of Science and Technology, Moscow (Russia)
  5. Univ. of California, Santa Barbara, CA (United States); Skolkovo Inst. of Science and Technology, Moscow (Russia); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

Single crystal microwires of a well–studied organic semiconductor used in organic solar cells, namely p–DTS(FBTTh2)2, are prepared via a self–assembly method in solution. The high level of intermolecular organization in the single crystals facilitates migration of charges, relative to solution–processed films, and provides insight into the intrinsic charge transport properties of p–DTS(FBTTh2)2. Field–effect transistors based on the microwires can achieve hole mobilities on the order of ≈1.8 cm2 V–1 s–1. Furthermore, these microwires show photoresponsive electrical characteristics and can act as photoswitches, with switch ratios over 1000. Here, these experimental results are interpreted using theoretical simulations using an atomistic density functional theory approach. Based on the lattice organization, intermolecular couplings and reorganization energies are calculated, and hole mobilities for comparison with experimental measurements are further estimated. These results demonstrate a unique example of the optoelectronic applications of p–DTS(FBTTh2)2 microwires.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1512767
Report Number(s):
LA-UR-17-23764
Journal Information:
Advanced Functional Materials, Vol. 28, Issue 4; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (6)

All-Optical-Input Transistors: Light-Controlled Enhancement of Plasmon-Induced Photocurrent journal August 2018
Strategies toward High‐Performance Solution‐Processed Lateral Photodetectors journal June 2019
Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications journal August 2019
Band-like transport in small-molecule thin films toward high mobility and ultrahigh detectivity phototransistor arrays journal January 2019
High-performance organic field-effect transistors based on organic single crystal microribbons fabricated by an in situ annealing method journal January 2018
Recent Progress in Organic Phototransistors: Semiconductor Materials, Device Structures and Optoelectronic Applications journal August 2019

Figures / Tables (6)

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Related Subjects

36 MATERIALS SCIENCE
Material Science
charge carrier mobility
field‐effect transistors
organic semiconductors
photodetectors
single‐crystals