Record High Efficiency Achievement under LED Light in Low Bandgap Donor-Based Organic Solar Cell through Optimal Design

Figure 5

(a) J-V characteristic curves of various OPVs coated with PY3 HTL at different rotation speeds. (b) J-V characteristic curves of the different OPVs with the PY1, PY2, PY3, PY4, PY5, and PDEOT : PSS HTLs. (c) Variation of PCE with doping concentration of the HTL (PPY : PSS). (d) IPCE spectra of the OPVs with the PY4 and PEDOT : PSS-based HTLs.

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