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(a) Absorptance of ZnO front electrodes used in this study as sketched in Figure 1, and of the optimized electrode used in the device of Figure 4. These measurements were made in air with an index-matching liquid (CH2I2). (b) EQE and 1-Reflection (1-R) of the four micromorph devices sketched in Figure 1 having only their ZnO electrodes changed. The number in parenthesis are current density values for the top and bottom cells, in mA/cm2.
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