Abstract
The role of poly(ethylene oxide) polymer is investigated as an effective buffer with Al electrodes to markedly improve the electrode interface and enhance the open-circuit voltage ( V OC) and the power conversion efficiency ( PCE,η) of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM)-based bulk-heterojunction ( BHJ ) solar cells. A unique process is developed by thermally co-evaporating the poly(ethylene glycol) dimethyl ether (PEGDE, Mn ca. 2000) polymer with Al metal simultaneously at different ratios in vacuum (10 -6Torr) to prepare the electrode buffers. The instant formation of a carbide-like junction at the ethylene oxide/Al interface during the thermal evaporation is of essential importance to the extraction of electrons through the Al electrode. The performance of P3HT:PCBM-based solar cells can be optimized by modulating the co-evaporation ratios of the PEGDE polymer with Al metal due to the changes in the work functions of the electrodes. The V OC and η for devices fabricated with Al electrode are 0.44 V and 1.64%, respectively, and significantly improve to 0.58 V and 4.00% when applying the PEGDE:Al(2:1)/Al electrode. This research leads to a novel electrode design - free of salts, additives, complicated syntheses, and having tunable work function - for fabricating high-performance photovoltaic cells.
| Original language | English |
|---|---|
| Pages (from-to) | 1192-1198 |
| Number of pages | 7 |
| Journal | Advanced Energy Materials |
| Volume | 1 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2011 Nov |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
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The roles of poly(ethylene oxide) electrode buffers in efficient polymer photovoltaics. / Jeng, Jun Yuan; Lin, Ming Wei; Hsu, Yao Jane; Wen, Ten-Chin; Guo, Tzung-Fang.
In: Advanced Energy Materials, Vol. 1, No. 6, 11.2011, p. 1192-1198.Research output: Contribution to journal › Article
TY - JOUR
T1 - The roles of poly(ethylene oxide) electrode buffers in efficient polymer photovoltaics
AU - Jeng, Jun Yuan
AU - Lin, Ming Wei
AU - Hsu, Yao Jane
AU - Wen, Ten-Chin
AU - Guo, Tzung-Fang
PY - 2011/11
Y1 - 2011/11
N2 - The role of poly(ethylene oxide) polymer is investigated as an effective buffer with Al electrodes to markedly improve the electrode interface and enhance the open-circuit voltage ( V OC) and the power conversion efficiency ( PCE,η) of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM)-based bulk-heterojunction ( BHJ ) solar cells. A unique process is developed by thermally co-evaporating the poly(ethylene glycol) dimethyl ether (PEGDE, Mn ca. 2000) polymer with Al metal simultaneously at different ratios in vacuum (10 -6Torr) to prepare the electrode buffers. The instant formation of a carbide-like junction at the ethylene oxide/Al interface during the thermal evaporation is of essential importance to the extraction of electrons through the Al electrode. The performance of P3HT:PCBM-based solar cells can be optimized by modulating the co-evaporation ratios of the PEGDE polymer with Al metal due to the changes in the work functions of the electrodes. The V OC and η for devices fabricated with Al electrode are 0.44 V and 1.64%, respectively, and significantly improve to 0.58 V and 4.00% when applying the PEGDE:Al(2:1)/Al electrode. This research leads to a novel electrode design - free of salts, additives, complicated syntheses, and having tunable work function - for fabricating high-performance photovoltaic cells.
AB - The role of poly(ethylene oxide) polymer is investigated as an effective buffer with Al electrodes to markedly improve the electrode interface and enhance the open-circuit voltage ( V OC) and the power conversion efficiency ( PCE,η) of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM)-based bulk-heterojunction ( BHJ ) solar cells. A unique process is developed by thermally co-evaporating the poly(ethylene glycol) dimethyl ether (PEGDE, Mn ca. 2000) polymer with Al metal simultaneously at different ratios in vacuum (10 -6Torr) to prepare the electrode buffers. The instant formation of a carbide-like junction at the ethylene oxide/Al interface during the thermal evaporation is of essential importance to the extraction of electrons through the Al electrode. The performance of P3HT:PCBM-based solar cells can be optimized by modulating the co-evaporation ratios of the PEGDE polymer with Al metal due to the changes in the work functions of the electrodes. The V OC and η for devices fabricated with Al electrode are 0.44 V and 1.64%, respectively, and significantly improve to 0.58 V and 4.00% when applying the PEGDE:Al(2:1)/Al electrode. This research leads to a novel electrode design - free of salts, additives, complicated syntheses, and having tunable work function - for fabricating high-performance photovoltaic cells.
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U2 - 10.1002/aenm.201100314
DO - 10.1002/aenm.201100314
M3 - Article
VL - 1
SP - 1192
EP - 1198
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 6
ER -