Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 6, Pages 7558-7564Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b00314
Keywords
Lead; NH3 center dot H2O; Cyclic utilization; Carbon-based; Perovskite solar cells
Categories
Funding
- National Natural Science Foundation of China (NSFC) [61775131, 51590902, 61376009]
- Shanghai Municipal Natural Science Foundation [16ZR1441000]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [2013-70]
- Shu Guang project - Shanghai Municipal Education Commission
- Shanghai Education Development Foundation [13SG55]
- Shanghai Polytechnic University Graduate Student Foundation [EGD16YJ006]
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An environmentally friendly dissolving-precipitating method is developed to recycle lead from carbon-based perovskite solar cells (PSCs). N,N-Dimethylformamide (DMF) was used to dissolve PSCs and to obtain lead containing lixivium. NH3 center dot H2O was used as a precipitator to extract lead ions from the lixivium. The result analyzed by inductively coupled plasma optical emission (ICP-OES) shows that 99.9% of lead can be extracted by NH3 center dot H2O. Then, HI was used to generate PbI2. ICP-OES analysis and thermodynamic calculation are used to analyze the lead content. The results show that little PbI2 transforms into [PbI4](2-) due to the low concentration of hydroiodic acid (HI). The calculated lead recovery rate is 95.7%. The recycled PbI2 was used to fabricate carbon-based PSCs achieving an efficiency of 11.36%, which is comparable to that (12.17%) of carbon-based PSCs fabricated with commercial PbI2. The developed process provides a new approach for the cyclic utilization of lead in carbon-based PSCs to avoid lead pollution.
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