Abstract
Here, we report doping of cadmium telluride (CdTe) thin film solar cells using copper (II) chloride (CuCl2) solution in deionized water. The CdTe thin films were immersed in 0.1 mmol CuCl2 solution in water and annealed in the temperature range of 180 - 240 °C for various time durations. The devices were completed using thermally evaporated gold (Au) and measured under simulated AM1.5G spectrum. The average device efficiency of CuCl2 treated CdTe devices increased to 13.7 % (best cell reaching 14.0%) with significant improvement on open-circuit voltage (VOC) as compared with 12.4% (best cell 12.7%) for thermally evaporated Cu doped CdTe devices. For CuCl2 treated CdTe devices, we found higher photoluminescence (PL) intensity and longer carrier life time at room temperature indicating solution based doping offers better control of Cu doping density as compared with evaporated Cu.
Original language | American English |
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Pages | 1846-1850 |
Number of pages | 5 |
DOIs | |
State | Published - Jun 2019 |
Event | 46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States Duration: 16 Jun 2019 → 21 Jun 2019 |
Conference
Conference | 46th IEEE Photovoltaic Specialists Conference, PVSC 2019 |
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Country/Territory | United States |
City | Chicago |
Period | 16/06/19 → 21/06/19 |
Bibliographical note
Publisher Copyright:© 2019 IEEE.
NREL Publication Number
- NREL/CP-5K00-76281
Keywords
- CdTe
- CuCl
- doping
- solar cells
- thin films