High-efficiency perovskite quantum dot solar cells benefiting from a conjugated polymer-quantum dot bulk heterojunction connecting layer

Abstract

Through constructing polymer-quantum dot bulk heterojunction interfaces, we reported efficient CsPbI3 and FAPbI3 perovskite quantum dot solar cells.

Toward Efficient and Stable Perovskite Solar Cells: Choosing Appropriate Passivator to Specific Defects

“…[ 135 ] Achieving multiple functions of morphology optimization, surface passivation, and moisture resistance, conjugated polymer materials have significant potential to become a facile and universal strategy to enhance device performance and long‐term stability. [ 136–138 ]…”

Contrasting Electron and Hole Transfer Dynamics from CH(NH2)2PbI3 Perovskite Quantum Dots to Charge Transport Layers

“…Figure 1a shows the structure of PTAA/FAPbI 3 /TiO 2 sample, where the thickness of the ETL TiO 2 , the light harvester layer FAPbI 3 PQDs, and the HTL PTAA doped by tris(pentafluorophenyl)borane is~50 nm,~160 nm, and~40 nm, respectively. As shown in Figure 1b [25,33,34], respectively, which are in favor of the charge transfer. From the TEM image of the pure FAPbI 3 PQDs (Figure 1c), we found the PQDs have an average size of about 15 nm.…”

“…The FAPbI 3 PQDs were synthesized according to the recent report [25]. For fabrication of the PTAA/FAPbI 3 /TiO 2 sample, a 50 nm compact hydrothermal TiO 2 layer was deposited above the quartz substrate.…”

“…Compared with MAPbI 3 , FAPbI 3 is superior in light absorption characteristics [17][18][19][20][21] and thermal stability [21,22]. In particular, FAPbI 3 can be fabricated as quantum dots (QDs) which possess proper phase structure and crystalline orientation without the need of high temperature annealing [23][24][25]. Relative to bulk or thin-film perovskite materials, perovskite QDs (PQDs) possess high crystallinity during synthesis and exhibit unique features such as tunable bandgaps [26,27] and high quantum yield [28][29][30][31], which contribute to PV applications.…”

“…Relative to bulk or thin-film perovskite materials, perovskite QDs (PQDs) possess high crystallinity during synthesis and exhibit unique features such as tunable bandgaps [26,27] and high quantum yield [28][29][30][31], which contribute to PV applications. The corresponding PSCs made of FAPbI 3 PQDs have been demonstrated to exhibit reasonable high PCEs [25,32]. However, the investigation of CT processes to reveal the intrinsic transfer time and efficiency is still lacking, which hinders the clarification of the important factors limiting the PCEs.…”