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A DMF-assisted solution process boosts the efficiency in P3HT:PCBM solar cells up to 5.31%
| Content Provider | Scilit |
|---|---|
| Author | Cheng, Pei Li, Yongfang Zhan, Xiaowei |
| Copyright Year | 2013 |
| Description | Journal: Nanotechnology To achieve ideal phase separation in P3HT:PCBM (1:1, w/w) blend films, a selective second solvent, DMF, which cannot dissolve P3HT but slightly dissolves PCBM, was added into 1,2-dichlorobenzene. Addition of 10% DMF led to better charge transport, better morphology and average power conversion efficiency (PCE) enhancement from 3.75% to 4.29%. To form an acceptor rich layer near the cathode and achieve effective vertical phase separation, PCBM solution in DMF was spin-coated on the top surface of the P3HT:PCBM active layer. The PCBM rich layer enhanced hole blocking and electron transport, leading to an average PCE improvement from 4.29% to 4.83% (for the PCBM rich layer formed by a 2 mg ml−1 PCBM solution). Finally, to obtain more uniform and smooth films with better contact of Ca/PCBM and BHJ/PCBM interfaces, the films were thermally annealed at 120 ° C for 10 min after spin coating the PCBM rich layer, leading to an average PCE enhancement from 4.83% to 5.17% (the best PCE was 5.31%). |
| Related Links | http://iopscience.iop.org/0957-4484/24/48/484008/pdf/0957-4484_24_48_484008.pdf |
| ISSN | 09574484 |
| e-ISSN | 13616528 |
| DOI | 10.1088/0957-4484/24/48/484008 |
| Journal | Nanotechnology |
| Issue Number | 48 |
| Volume Number | 24 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2013-11-06 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nanotechnology Power Conversion Efficiency |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering |
