Abstract
Abstract Luminescence downshifting (LDS) layer integration has been proven to be an efficient way to ameliorate the poor UV-blue spectral response and improve the power conversion efficiency (PCE) for solar cells (SCs). By employing an in situ fabricated CH3NH3PbBr3 (CH3NH3 = methylammonium, MAPbBr3) quantum dot/polyacrylonitrile (PAN) composite film as the LDS layer, we observed a clear enhancement in the external quantum efficiency (EQE) for silicon SCs, predominantly in the UV-blue region. With a theoretically calculated intrinsic LDS efficiency (η LDS) of up to 72%, silicon SCs with the LDS layer exhibited an absolute value of 1% for PCE improvement in comparison to those without the LDS layer. The combination of easy fabrication and low cost makes it a practical way to achieve photovoltaic enhancement of Si-based SCs.
Highlights
IntroductionPhotovoltaic (PV) technologies based on silicon semiconductor have made considerable strides in the past decades
Photovoltaic (PV) technologies based on silicon semiconductor have made considerable strides in the past decadesSince silicon solar cells (SCs) have relatively strong absorption in the middle wavelength region in comparison to UV-blue shortwave length region of visible irradiation, luminescence downshifting (LDS), which converts the higher energy photons that cannot be sufficiently utilized into lower energy photons that can be well used for photocurrent generation, should be a straightforward route to improve the UV-blue response
The results prove that PQDs/polymer composite film (PQDCF) should be an ideal Luminescence downshifting (LDS) layer for improving the UV-blue spectral response without disturbing any other light utilization for SCs
Summary
Photovoltaic (PV) technologies based on silicon semiconductor have made considerable strides in the past decades. Simple process, low cost, and fabrication scale-up of the LDS layer are beneficial for large-scale integration with silicon SCs. LDS integration by combining LDS composition with the appropriate matrix is a challenging but impactful means for improving the performance of SCs. LDS integration by combining LDS composition with the appropriate matrix is a challenging but impactful means for improving the performance of SCs Because of their outstanding optical properties, perovskite quantum dots (PQDs) have attracted much attention. Different from other LDS layer processing schemes, thermal injection synthesis of QDs followed by solution dispersion in the matrix [44, 45] allows PQDs to be uniformly embedded in a polymer matrix by in situ fabrication, as we have previously shown [46, 47], which can efficiently overcome the issue of irreversible nanoparticle aggregation and undesirable luminescence quenching. In situ fabrication from a solution precursor ensures that such composite films are greatly beneficial for simplifying the LDS layer fabrication and scale-up in comparison to other LDS integration methods
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
