Efficient Hole Transfer via CsPbBr₃ Quantum Dots Doping toward High‐Performance Organic Solar Cells

Abstract

Among the emerging photovoltaic technologies, organic and perovskite quantum dots (PQDs) solar cells have thrived on low-cost processing and extraordinary optoelectronic properties. Herein, CsPbBr 3 PQDs are incorporated into PM6: Y6-BO organic solar cell (OSC) to enhance device efficiency without scarifying the device stability. While the incorporation of PQDs has no impact on the molecular packing and phase separation of organic semiconductors, their presence enhances light absorption due to the Rayleigh scattering effect, promotes exciton dissociation in the Y6-BO phase, and forms an efficient hole transfer pathway from Y6-BO to PQDs and then to PM6 to improve hole transport. These contribute to increased short-circuit current density ( J SC ) and fill factor (FF) of OSCs with constant V OC . With the presence of 1 wt% CsPbBr 3 PQDs doping, the highest power conversion efficiency (PCE) of the corresponding PM6:Y6-BO OSC is improved from 16.4% to 17.1%, where the device stability has not been affected due to the better phase stability of CsPbBr 3 PQDs than CsPbI 3 PQDs. This work unravels a new approach to enhance the efficiency of OSCs by applying PQDs doping to manipulate the photon-to-electricity conversion process.

Self-Assembled Biomolecule Interlayer for Enhanced Efficiency and Stability of Inverted Organic Solar Cells

“…As shown in Figure 1f and Figure S1c (Supporting Information), the PL intensity of neat BTP-4F-C5-16 or IT-4F films deposited on ZnO/PAA films is quenched more efficiently compared to the films deposited on ZnO, confirming that PAA has enhanced the carrier collection ability of ZnO. 27 Furthermore, the introduction of PAA only increased the absorption of the ZnO/PAA ETL film in the ultraviolet region but maintained a high transmittance above 300 nm (Figure 1g), allowing sufficient light to reach the active layers. After depositing the active layer, a slight red-shift in the absorption region of NFAs (Figure 1h and Figure S1b, Supporting Information) can be observed, implying that PAA has altered the aggregation of NFAs, which will be discussed later.…”

“…To validate that, steady-state photoluminescence (PL) was performed to evaluate the electron extraction ability of ZnO and ZnO/PAA films. As shown in Figure f and Figure S1c (Supporting Information), the PL intensity of neat BTP-4F-C5-16 or IT-4F films deposited on ZnO/PAA films is quenched more efficiently compared to the films deposited on ZnO, confirming that PAA has enhanced the carrier collection ability of ZnO . Furthermore, the introduction of PAA only increased the absorption of the ZnO/PAA ETL film in the ultraviolet region but maintained a high transmittance above 300 nm (Figure g), allowing sufficient light to reach the active layers.…”

Recent progress and future prospects on halide perovskite nanocrystals for optoelectronics and beyond

“…In a recent study, Miao et al. found the use of CsPbBr 3 NCs instead could enhance the device efficiency without scarifying the device stability ( Miao et al., 2021 ). With the presence of 1 wt % CsPbBr 3 NCs doping, the highest PCE of the corresponding PM6:Y6-BO solar cell was improved from 16.4% to 17.1%, where the device stability was not affected due to the better phase stability of CsPbBr 3 NCs than CsPbI 3 NCs.…”

In/Outdoor Organic Solar Cells with Effective Photon‐Harvesting by Introducing Light‐Amplification Layer with Eco‐Friendly QDs

“…[ 13 ] Meanwhile, Wang et al proposed QD organic solar cells (QD‐OSCs) with the application of CsPbBr 3 or CsPbI 3 perovskite QDs (PQDs) to PM6:Y6‐BO‐based OSCs, and it reinforced the light absorption properties through PQD scattering, achieving an improved efficiency of 17.1%. [ 14 ]…”

“…[13] Meanwhile, Wang et al proposed QD organic solar cells (QD-OSCs) with the application of CsPbBr 3 or CsPbI 3 perovskite QDs (PQDs) to PM6:Y6-BO-based OSCs, and it reinforced the light absorption properties through PQD scattering, achieving an improved efficiency of 17.1%. [14] In addition, the QD-OSCs strategy through various QDs can improve the efficiency through surface control based on a shell þ ligand structure and provide optical advantages based on the emission properties of the core constituting the QDs. [15][16][17] Other available methods include controlling E gap and improving stability through active structure change strategies [18,19] and concentrating photon energy through light-emitting solar concentrators (LSC).…”