Cross-linked hole transport layers for high-efficiency perovskite tandem solar cells

Wang, Yurui; Gu, Shuai; Liu, Guoliang; Zhang, Liping; Lin, Renxing; Xiao, Ke; Luo, Xin; Shi, Jing; Du, Jieqiong; Meng, Fanying; Li, Ludong; Liu, Zhengxin; Tan, Hairen

doi:10.1007/s11426-021-1059-1

Cited by 28 publications

(15 citation statements)

References 49 publications

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“…With this understanding, we fabricate high efficiency 1.79 eV PSCs exhibiting PCEs approaching 17% with a V OC of 1.22 V, which is among the highest reported for MA-free wide bandgap PSCs. [31][32][33][34][35] Furthermore, we identify that new transport layers are crucial to harness the full performance potential of these MA-free wide bandgap perovskites.…”

Section: Papermentioning

confidence: 99%

Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cells

Oliver

Caprioglio

Peña‐Camargo

et al. 2022

Energy Environ. Sci.

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Section: Papermentioning

confidence: 99%

Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cells

Oliver

Caprioglio

Peña‐Camargo

et al. 2022

Energy Environ. Sci.

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“…The spontaneous self‐assembly process enables the formation of a polymer network structure, which favors sufficient charge transportation. [ 35 ] As demonstrated in the Fourier transform infrared spectroscopy (Figure S6A, Supporting Information), the gradual decrease of the peak intensity at 1654 cm −1 (CC) under the annealing process indicates the occurrence of thermal crosslinking of MCz‐VPOZ. By roughly analyzing the peak‐area ratio, an estimated crosslinking degree of 76.9% was obtained after thermal annealing.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, methoxy groups are incorporated at 3-, and 6-position of the carbazole unit to render passivation effect and interfacial functionalization, [26,33] and the 4-vinylphenyl groups are suspended to 3,6-position of the phenoxazine unit to endow the molecule with cross-linking ability. [34,35] The synthesis of MCz-VPOZ involves only three steps with a high total yield of 66%, indicating its low material cost and high potential in the scalable application. The detailed molecular synthesis, purification process, and estimated material cost can be found in Scheme S1, Figures S1,S2 and Tables S1,S2 (Supporting Information).…”

Section: Materials Design Synthesis and Characterizationmentioning

confidence: 99%

Thermally Crosslinked Hole Conductor Enables Stable Inverted Perovskite Solar Cells with 23.9% Efficiency

et al. 2023

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Poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine] (PTAA) represents the state‐of‐the‐art hole transport material (HTM) in inverted perovskite solar cells (PSCs). However, unsatisfied surface properties of PTAA and high energy disorder in the bulk film hinder the further enhancement of device performance. Herein, a simple small molecule 10‐(4‐(3,6‐dimethoxy‐9H‐carbazol‐9‐yl)phenyl)‐3,7‐bis(4‐vinylphenyl)‐10H‐phenoxazine (MCz‐VPOZ) is strategically developed for in situ fabrication of polymer hole conductor (CL‐MCz) via a facile and low‐temperature cross‐linking technology. The resulting polymer CL‐MCz offers high energy ordering and improved electrical conductivity, as well as appropriate energy‐level alignment, enabling efficient charge carrier collection in the devices. Meanwhile, CL‐MCz synchronously provides satisfied surface wettability and interfacial functionalization, facilitating the formation of high‐quality perovskite films with fewer bulk iodine vacancies and suppressed carrier recombination. Significantly, the device with CL‐MCz yields a champion efficiency of 23.9% along with an extremely low energy loss down to 0.41 eV, which represents the highest reported efficiency for non‐PTAA‐based polymer HTMs in inverted PSCs. Furthermore, the corresponding unencapsulated devices exhibit competitive shelf‐life stability under various operational stressors up to 2500 h, reflecting high promises of CL‐MCz in the scalable PSC application. This work underscores the promising potential of the cross‐linking approach in preparing low‐cost, stable, and efficient polymer HTMs toward reliable PSCs.

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“…also employed NiO x /2PACz HTL for perovskite/silicon TSCs, and a PCE of 27.6% was obtained [ 190 ]. Tan’ group demonstrated increased V OC and PCE of WBG PSCs by replacing commonly used PTAA with in situ cross-linked small molecule N4 , N4 ′-di(naphthalen-1-yl)- N4 , N4 ′-bis(4-vinylphenyl)biphenyl-4,4′-diamine (VNPB) [ 191 ]. The stronger interaction and lower defect density at the VNPB/perovskite interface contributed to the improved efficiency and stability of WBG PSCs, translating to PCEs of 24.9% and 25.4% for all-perovskite and perovskite-silicon TSCs, respectively.…”

Section: Optimization For Wbg Perovskitesmentioning

confidence: 99%

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

et al. 2023

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Perovskite-based tandem solar cells have attracted increasing interest because of its great potential to surpass the Shockley–Queisser limit set for single-junction solar cells. In the tandem architectures, the wide-bandgap (WBG) perovskites act as the front absorber to offer higher open-circuit voltage (VOC) for reduced thermalization losses. Taking advantage of tunable bandgap of the perovskite materials, the WBG perovskites can be easily obtained by substituting halide iodine with bromine, and substituting organic ions FA and MA with Cs. To date, the most concerned issues for the WBG perovskite solar cells (PSCs) are huge VOC deficit and severe photo-induced phase separation. Reducing VOC loss and improving photostability of the WBG PSCs are crucial for further efficiency breakthrough. Recently, scientists have made great efforts to overcome these key issues with tremendous progresses. In this review, we first summarize the recent progress of WBG perovskites from the aspects of compositions, additives, charge transport layers, interfaces and preparation methods. The key factors affecting efficiency and stability are then carefully discussed, which would provide decent guidance to develop highly efficient and stable WBG PSCs for tandem application.

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Cross-linked hole transport layers for high-efficiency perovskite tandem solar cells

Cited by 28 publications

References 49 publications

Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cells

Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cells

Thermally Crosslinked Hole Conductor Enables Stable Inverted Perovskite Solar Cells with 23.9% Efficiency

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

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