TY - JOUR
T1 - Morphological Control of 2D Hybrid Organic-Inorganic Semiconductor AgSePh
AU - Paritmongkol, Watcharaphol
AU - Lee, Woo Seok
AU - Shcherbakov-Wu, Wenbi
AU - Ha, Seung Kyun
AU - Sakurada, Tomoaki
AU - Oh, Soong Ju
AU - Tisdale, William A.
N1 - Funding Information:
The authors thank Prof. Mahesh K. Gangishetty and Prof. Daniel Congreve for advice and use of facilities for the growth of silver films. This work was supported by the U.S. Army Research Office under Award W911NF-20-1-0200. This work made use of the MRSEC Shared Experimental Facilities at MIT, supported by the National Science Foundation under Award DMR-08-19762. W.S.L was partially supported by the Seoul Broadcasting System Foundation Overseas Doctoral Program Scholarship. T.S. was supported by AGC Inc. (formerly Asahi Glass Co., Ltd.).
Publisher Copyright:
© 2022 American Chemical Society
PY - 2022/2/22
Y1 - 2022/2/22
N2 - Silver phenylselenolate (AgSePh) is a hybrid organic-inorganic two-dimensional (2D) semiconductor exhibiting narrow blue emission, in-plane anisotropy, and large exciton binding energy. Here, we show that the addition of carefully chosen solvent vapors during the chemical transformation of metallic silver to AgSePh allows for control over the size and orientation of AgSePh crystals. By testing 28 solvent vapors (with different polarities, boiling points, and functional groups), we controlled the resulting crystal size from <200 nm up to a few μm. Furthermore, choice of solvent vapor can substantially improve the orientational homogeneity of 2D crystals with respect to the substrate. In particular, solvents known to form complexes with silver ions, such as dimethyl sulfoxide (DMSO), led to the largest lateral crystal dimensions and parallel crystal orientation. We perform systematic optical and electrical characterizations on DMSO vapor-grown AgSePh films demonstrating improved crystalline quality, lower defect densities, higher photoconductivity, lower dark conductivity, suppression of ionic migration, and reduced midgap photoluminescence at low temperature. Overall, this work provides a strategy for realizing AgSePh films with improved optical properties and reveals the roles of solvent vapors on the chemical transformation of metallic silver.
AB - Silver phenylselenolate (AgSePh) is a hybrid organic-inorganic two-dimensional (2D) semiconductor exhibiting narrow blue emission, in-plane anisotropy, and large exciton binding energy. Here, we show that the addition of carefully chosen solvent vapors during the chemical transformation of metallic silver to AgSePh allows for control over the size and orientation of AgSePh crystals. By testing 28 solvent vapors (with different polarities, boiling points, and functional groups), we controlled the resulting crystal size from <200 nm up to a few μm. Furthermore, choice of solvent vapor can substantially improve the orientational homogeneity of 2D crystals with respect to the substrate. In particular, solvents known to form complexes with silver ions, such as dimethyl sulfoxide (DMSO), led to the largest lateral crystal dimensions and parallel crystal orientation. We perform systematic optical and electrical characterizations on DMSO vapor-grown AgSePh films demonstrating improved crystalline quality, lower defect densities, higher photoconductivity, lower dark conductivity, suppression of ionic migration, and reduced midgap photoluminescence at low temperature. Overall, this work provides a strategy for realizing AgSePh films with improved optical properties and reveals the roles of solvent vapors on the chemical transformation of metallic silver.
KW - defects
KW - hybrid semiconductors
KW - metal organic chalcogenolates
KW - optical properties
KW - photodetectors
KW - synthesis
KW - two-dimensional
UR - http://www.scopus.com/inward/record.url?scp=85124004419&partnerID=8YFLogxK
U2 - 10.1021/acsnano.1c07498
DO - 10.1021/acsnano.1c07498
M3 - Article
C2 - 35098708
AN - SCOPUS:85124004419
SN - 1936-0851
VL - 16
SP - 2054
EP - 2065
JO - ACS nano
JF - ACS nano
IS - 2
ER -