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Enhancement of thermoelectric figure-of-merit by resonant states of aluminium doping in lead selenide

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/c1ee02465e· OSTI ID:1386944
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [2]
  1. Xihua Univ., Chengdu, Sichuan (China); Boston College, Chestnut Hill, MA (United States)
  2. Boston College, Chestnut Hill, MA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
In this study, by adding aluminium (Al) into lead selenide (PbSe), we successfully prepared n-type PbSe thermoelectric materials with a figure-of-merit (ZT) of 1.3 at 850 K. Such a high ZT is achieved by a combination of high Seebeck coefficient caused by very possibly the resonant states in the conduction band created by Al dopant and low thermal conductivity from nanosized phonon scattering centers.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FG02-08ER46516; SC0001299
OSTI ID:
1386944
Journal Information:
Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 1 Vol. 5; ISSN EESNBY; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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