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The power conversion efficiency (PCE) of CsPbI2Br perovskite solar cells (PSCs) is still far from the theoretical efficiency due to the pronounced losses in open‐circuit voltage (VOC). The VOC loss can be mitigated by employing an appropriate hole transport layer (HTL), which facilitates energy level alignment and minimizes interface recombination losses. In this work, two D‐π‐A type polymers are...
The nonlinear response of a ferroic to an applied field has been studied through the phenomenological Rayleigh Law for over a hundred years. Yet, despite this, the fundamental physical mechanisms at the nanoscale that lead to macroscopic Rayleigh behavior have remained largely elusive, and experimental evidence at small length scales is limited. Here, it is shown using a combination of scanning probe...
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