Journal
ACS ENERGY LETTERS
Volume 2, Issue 9, Pages 2110-2117Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.7b00505
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Funding
- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Economy, Trade, and Industry (METI)
- Japan Science and Technology Agency (JST) CREST [JPMJCR12C4]
- MEXT KAKENHI [16H03824]
- Grants-in-Aid for Scientific Research [15K05596, 16H03824] Funding Source: KAKEN
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A systematic investigation into the performance of PbS quantum dot (QD)/ZnO nanowire (NW) solar cells in the near-infrared (NIR) and short-wave infrared (SWIR) regions was carried out. The solar cells were confirmed to convert a wide range of solar energy (3.54-0.62 eV, corresponding to 0.35-2.0 mu m). We found that the solar cells working in the SWIR region had a high open-circuit voltage (V-oc). A relatively high V-oc of 0.25 V was achieved even in solar cells whose photocurrent onsets were at approximately 0.64 eV (1.9 mu m); this V-oc is as high as that of Ge solar cells, which have been used for III-V compound semiconductor triple junction solar cells. Although short-circuit current density and fill factor have to be further increased, these results indicate that solution-processed colloidal QD solar cells with ZnO NWs are promising candidates for the middle and/or bottom subcells of multijunction solar cells.
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