Abstract
Topological crystalline insulators (TCIs) are predicted to be a promising candidate material for ultra-broadband photodetectors ranging from ultraviolet (UV) to terahertz (THz) due to its gapless surface state and narrow bulk bandgap. However, the low responsivity of TCIs-based photodetectors limits their further applications. In this regard, a high-performance photodetector based on SnTe, a recently developed TCI, working in a broadband wavelength range from deep UV to mid-IR with high responsivity is reported. By taking advantage of the strong light absorption and small bandgap of SnTe, photodetectors based on the as-grown SnTe crystalline nanoflakes as well as specific short channel length achieve a high responsivity (71.11 A W−1 at 254 nm, 49.03 A W−1 at 635 nm, 10.91 A W−1 at 1550 nm, and 4.17 A W−1 at 4650 nm) and an ultra-broad spectral response (254–4650 nm) simultaneously. Moreover, for the first time, a durable flexible SnTe photodetector fabricated directly on a polyethylene terephthalate film is demonstrated. These results prove the great potential of TCIs as a promising material for integrated and flexible optoelectronic devices.
| Original language | English |
|---|---|
| Article number | 1802598 |
| Journal | Small |
| Volume | 14 |
| Issue number | 37 |
| DOIs | |
| Publication status | Published - 13 Sep 2018 |
Keywords
- flexible photodetector
- high responsivity
- SnTe
- topological crystalline insulators
- ultra-broadband
Cite this
}
Ultra-Broadband Flexible Photodetector Based on Topological Crystalline Insulator SnTe with High Responsivity. / Yang, Jie; Yu, Wenzhi; Pan, Zhenghui; Yu, Qiang; Yin, Qing; Guo, Lei; Zhao, Yanfei; Sun, Tian; Bao, Qiaoliang; Zhang, Kai.
In: Small, Vol. 14, No. 37, 1802598, 13.09.2018.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Ultra-Broadband Flexible Photodetector Based on Topological Crystalline Insulator SnTe with High Responsivity
AU - Yang, Jie
AU - Yu, Wenzhi
AU - Pan, Zhenghui
AU - Yu, Qiang
AU - Yin, Qing
AU - Guo, Lei
AU - Zhao, Yanfei
AU - Sun, Tian
AU - Bao, Qiaoliang
AU - Zhang, Kai
PY - 2018/9/13
Y1 - 2018/9/13
N2 - Topological crystalline insulators (TCIs) are predicted to be a promising candidate material for ultra-broadband photodetectors ranging from ultraviolet (UV) to terahertz (THz) due to its gapless surface state and narrow bulk bandgap. However, the low responsivity of TCIs-based photodetectors limits their further applications. In this regard, a high-performance photodetector based on SnTe, a recently developed TCI, working in a broadband wavelength range from deep UV to mid-IR with high responsivity is reported. By taking advantage of the strong light absorption and small bandgap of SnTe, photodetectors based on the as-grown SnTe crystalline nanoflakes as well as specific short channel length achieve a high responsivity (71.11 A W−1 at 254 nm, 49.03 A W−1 at 635 nm, 10.91 A W−1 at 1550 nm, and 4.17 A W−1 at 4650 nm) and an ultra-broad spectral response (254–4650 nm) simultaneously. Moreover, for the first time, a durable flexible SnTe photodetector fabricated directly on a polyethylene terephthalate film is demonstrated. These results prove the great potential of TCIs as a promising material for integrated and flexible optoelectronic devices.
AB - Topological crystalline insulators (TCIs) are predicted to be a promising candidate material for ultra-broadband photodetectors ranging from ultraviolet (UV) to terahertz (THz) due to its gapless surface state and narrow bulk bandgap. However, the low responsivity of TCIs-based photodetectors limits their further applications. In this regard, a high-performance photodetector based on SnTe, a recently developed TCI, working in a broadband wavelength range from deep UV to mid-IR with high responsivity is reported. By taking advantage of the strong light absorption and small bandgap of SnTe, photodetectors based on the as-grown SnTe crystalline nanoflakes as well as specific short channel length achieve a high responsivity (71.11 A W−1 at 254 nm, 49.03 A W−1 at 635 nm, 10.91 A W−1 at 1550 nm, and 4.17 A W−1 at 4650 nm) and an ultra-broad spectral response (254–4650 nm) simultaneously. Moreover, for the first time, a durable flexible SnTe photodetector fabricated directly on a polyethylene terephthalate film is demonstrated. These results prove the great potential of TCIs as a promising material for integrated and flexible optoelectronic devices.
KW - flexible photodetector
KW - high responsivity
KW - SnTe
KW - topological crystalline insulators
KW - ultra-broadband
UR - http://www.scopus.com/inward/record.url?scp=85052470695&partnerID=8YFLogxK
U2 - 10.1002/smll.201802598
DO - 10.1002/smll.201802598
M3 - Article
VL - 14
JO - Small
JF - Small
SN - 1613-6810
IS - 37
M1 - 1802598
ER -