Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells
[1];
- Yale Univ., New Haven, CT (United States). Dept. of Chemical and Environmental Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Yale Univ., New Haven, CT (United States). Dept. of Electrical Engineering and Dept. of Applied Physics
- Univ. of Central Florida, Orlando, FL (United States). NanoScience Technology Center, Electrical and Computer Engineering, Materials Science and Engineering
Mechanical fragility and insufficient light absorption are two major challenges for thin flexible crystalline Si-based solar cells. Flexible hybrid single-walled carbon nanotube (SWNT)/Si solar cells are demonstrated by applying scalable room-temperature processes for the fabrication of solar-cell components (e.g., preparation of SWNT thin films and SWNT/Si p–n junctions). The flexible SWNT/Si solar cells present an intrinsic efficiency ≈7.5% without any additional light-trapping structures. By using these solar cells as model systems, the charge transport mechanisms at the SWNT/Si interface are investigated using femtosecond transient absorption. Although primary photon absorption occurs in Si, transient absorption measurements show that SWNTs also generate and inject excited charge carriers to Si. Such effects can be tuned by controlling the thickness of the SWNTs. Thus, findings from this study could open a new pathway for designing and improving the efficiency of photocarrier generation and absorption for high-performance ultrathin hybrid SWNT/Si solar cells.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Sobotka Research Fund; Terracon Corp., Bellingham, MA (United States); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Yale Univ., New Haven, CT (United States); Chasm Advanced Materials, Canton, MA (United States)
- Grant/Contract Number:
- SC0012704; CBET‐0954985; DMR‐1410171; SC000160; DMR 1119826
- OSTI ID:
- 1426448
- Report Number(s):
- BNL-203328-2018-JAAM
- Journal Information:
- Small, Vol. 13, Issue 48; ISSN 1613-6810
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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