A critical review on the moisture stability of halide perovskite films and solar cells

Designed p-type Graphene Quantum Dots to Heal Interface Charge Transfer in Sn-Pb Perovskite Solar Cells

Third-order optical nonlinearities and high-order harmonics generation in Ni-doped CsPbBr3 nanocrystals using single- and two-color chirped pulses

With the significant progress of low bandgap non-fullerene acceptors, the development of wide bandgap (WBG) donors possessing ideal complementary absorption is of crucial importance to further enhance the photovoltaic performance of organic solar cells. An ideal strategy to design WBG donors is to down-shift the highest occupied molecular orbital (HOMO) and up-shift the lowest unoccupied molecular orbital (LUMO). A properly low-lying HOMO of the donor is favorable to obtaining a high open-circuit voltage, and a properly high-lying LUMO of the donor is conductive to efficient exciton dissociation. This work provides a new strategy to enlarge the bandgap of a polymer with simultaneously decreased HOMO and increased LUMO by increasing the polymer backbone curvature. The polymer PIDT-fDTBT with a large molecular backbone curvature shows a decreased HOMO of -5.38 eV and a prominently increased LUMO of -3.35 eV relative to the linear polymer PIDT-DTBT (EHOMO = -5.30 eV, ELUMO = -3.55 eV). The optical bandgap of PIDT-fDTBT is obviously broadened from 1.75 to 2.03 eV. This work demonstrates that increasing the polymer backbone curvature can effectively broaden the bandgap by simultaneously decreasing HOMO and increasing LUMO, which may guide the design of WBG conjugated materials.

An Effective Strategy to Design a Large Bandgap Conjugated Polymer by Tuning the Molecular Backbone Curvature.

The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects

Urgent requirements for high-efficiency and low-cost photovoltaic devices are constantly pushing forward the development of emerging solar cells. Currently, organic solar cells (OSCs) and perovskites solar cells (PSCs) are considered most likely commercialized solar cells in the short-term period. Enormous optimization strategies towards optimizing the device efficiency and stability have been developed. It is noteworthy that the well-known small-sized quantum dots (QDs) have been explored as the additional components in OSCs and PSCs, and have yielded rather modest amelioration of the device performance. Herein, we reviewed recent advances in strategically integrating all kinds of QDs (consisting of metal chalcogenide-based QDs, perovskite QDs, InP-based QDs, carbon QDs, graphene QDs, black phosphorus QDs, and other emerging two-dimensional QDs) and the associated relevant performance enhancement of OSCs and PSCs. In view of each type of QDs, we have mainly emphasized their involved device configuration, integration location, and physical mechanism. In addition, the fundamental structures, operation principles, and analogies/distinctions of OSCs and PSCs have been briefly outlined. Finally, existing challenges and future prospects based on QDs-integrated OSCs and PSCs have been listed.

Strategically integrating quantum dots into organic and perovskite solar cells

Synergistic combination of TiO2-sol interconnecting-modified photoanode with alginate hydrogel-assisted electrolyte for quantum dots sensitized solar cells

Ming Chen

Papers

Strategically integrating quantum dots into organic and perovskite solar cells

Synergistic combination of TiO2-sol interconnecting-modified photoanode with alginate hydrogel-assisted electrolyte for quantum dots sensitized solar cells