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Robust and Highly Conductive Water-Stable Copper Iodide-Based Hybrid Single Crystals

Journal Article · · Chemistry of Materials
 [1];  [1];  [2];  [3];  [1];  [3];  [1];  [4];  [1];  [4];  [1]
  1. Rutgers University, Piscataway, NJ (United States)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
High conductivity, carrier mobility as well as long diffusion length are critical for highly efficient solar cells. Here, we report new types of crystalline inorganic-organic hybrid semiconductors, 2D-Cu2I2(L) [L = benzo[c][1,2,5]thiadiazole (bs) and benzo[c][1,2,5] selenadiazole (bse)], composed of one-dimensional (1D) copper iodide staircase-like chain and benzodiazole-based ligands. These compounds possess narrow and tunable band gaps and high conductivity. High-quality large single crystals of 2D-Cu2I2(bse) were grown and used to evaluate the charge transport properties of the material. State-of-the-art time-resolved microwave conductivity (TRMC) techniques were used to investigate the charge carrier dynamics, from which a high conductivity of 2 × 10-4 S/cm, a carrier mobility of ~1 cm2 V-1 s-1, a maximum doping/carrier density of 2 +/- 1 × 1015 cm-3, and a diffusion length of ~0.17 um were obtained. We report the excellent water/chemical stability combined with high conductivity makes this I-VII-based hybrid material family promising candidates for potential optoelectronic applications.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States); Wake Forest University, Winston-Salem, NC (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-05CH11231; AC36-08GO28308; SC0012704; SC0019902
OSTI ID:
1903774
Alternate ID(s):
OSTI ID: 2305673
OSTI ID: 1922716
Report Number(s):
BNL-223928-2023-JAAM; NREL/JA--5900-84780; NREL/JA-5900-84780; MainId:85553; UUID:bb1e7abf-65bd-429b-981c-3da8a46e1a67; MainAdminID:68245
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 22 Vol. 34; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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