Journal
FRONTIERS IN PHYSICS
Volume 7, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2019.00166
Keywords
CH3NH3PbI3; perovskite; thin-film solar cell; absolute electroluminescence (EL) efficiency measurements; energy losses
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Funding
- National Natural Science Foundation of China of China [61604055, 61704055, 61874044]
- Shanghai Pujiang Program of China [16PJ1402600]
- Program of Shanghai Science and Technology Committee of China [17142202500]
- KAKENHI from JSPS [15H03968]
- Photon Frontier Network Program of MEXT in Japan
- Grants-in-Aid for Scientific Research [15H03968] Funding Source: KAKEN
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Two organic-inorganic halide CH3NH3PbI3 perovskite solar cells prepared in the same experimental batch but having different power conversion efficiencies -18.46% and 17.15%-were investigated based on the absolute electroluminescence (EL) efficiency measurements and traditional I-V measurements. The possible factors that affect the power conversion efficiency were also investigated. Comparing the experimental I-V curves of the two solar cells, it was found that the short-circuit currents (J(sc)) were nearly the same; however, the open-circuit voltages (V-oc) were markedly different. Moreover, the deduced I-V curves from the absolute EL efficiencies of the two solar cells, which were mainly affected by the material quality, were almost the same, proving that the device processing technology has a vital effect on V-oc.
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