The unique 1D crystal structure of Antimony Triselenide (SbSe) offers notable potential for use in flexible, lightweight devices due to its excellent bending characteristics. However, fabricating high-efficiency flexible SbSe solar cells is challenging, primarily due to the suboptimal contact interface between the embedded SbSe layer and the molybdenum back-contact, compounded by complex intrinsic defects. This study introduces a novel Molybdenum Trioxide (MoO) interlayer to address the back contact interface issues in flexible SbSe devices. Further investigations indicate that incorporating a MoO interlayer not only enhances the crystalline quality but also promotes a favorable [hk1] growth orientation in the SbSe absorber layer. It also reduces the barrier height at the back contact interface and effectively passivates harmful defects. As a result, the flexible SbSe solar cell, featuring a Mo-foil/Mo/MoO/SbSe/CdS/ITO/Ag substrate structure, demonstrates exceptional flexibility and durability, enduring large bending radii and multiple bending cycles while achieving an impressive efficiency of 8.23%. This research offers a straightforward approach to enhancing the performance of flexible SbSe devices, thereby expanding their application scope in the field of photovoltaics.
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| http://dx.doi.org/10.1002/advs.202310193 | DOI Listing |
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