Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 23, Pages 19988-19997Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b03694
Keywords
organic-inorganic perovskites; polymer solar cells; open-circuit voltages; charge generation mechanisms; charge recombination mechanisms
Funding
- Japan Science and Technology Agency (JST) PRESTO program (Photoenergy and Conversion Systems and Materials for the Next-Generation Solar Cells)
- Grants-in-Aid for Scientific Research [16J08768] Funding Source: KAKEN
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Herein, the open-circuit voltage (V-oc) loss in both polymer solar cells and perovskite solar cells is quantitatively analyzed:by measuring the temperature dependence of Voc to discuss the difference in the primary loss mechanism of V-oc between them..As a result, the photon energy loss for polymer solar cells is in the range of about 0.7-1.4 eV, which is ascribed to temperature-independent and-dependent loss mechanisms, while that for perovskite solar cells is as small as about 0.5 eV, which is ascribed to a temperature-dependent loss mechanism. This difference is attributed to the different charge generation and recombination mechanisms between the two devices. The potential strategies for the improvement of Voc in both solar cells are further discussed on the basis of the experimental data.
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