Circularly polarized luminescent (CPL) materials are currently attracting great interest. While a chiral building is usually necessary in order to obtain CPL materials, here, this study proposes a general approach for fabricating 1D circularly polarized luminescent nanoassemblies from achiral aromatic molecules or aggregation-induced emissive compounds (AIEgens). It is found that a C symmetric chiral gelator can individually form hexagonal nanotube structures and encapsulate the guest molecules. When achiral AIEgens are encapsulated into the confined nanotubes via organogelation, the AIEgens will emit circularly polarized luminescence. Further, the direction of the CPL could be controlled by the supramolecular chirality of the nanotube. Remarkably, the approach is universal and various kinds of the AIEgens can be doped to show such property, providing a full-color-tunable circularly polarized luminescence.

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Two hole‐transporting materials (HTMs) based on N,N,N′,N′‐ tetraphenylbenzidine (TPB) and MeO‐triphenylamine (MOTPA) are synthesized. The HTMs offer outstanding thermal stability, film‐forming properties, and hole mobilities. Perovskite solar cells (PSCs) are prepared using either pristine HTM layers or layers doped with cobalt salts. The nondoped PSCs with as‐synthesized HTMs show better performance compared to spiro‐OMeTAD, especially for long‐time stability in ambient air. The power conversion efficiency (PCE) of the cells decreases by only 3 % after 600 h of storage. The nondoped hole‐transport layer (HTL) are hydrophobic, with a contact angle of 94.3° to water. The moisture‐repelling ability of these HTMs are demonstrated by exposing the nondoped PSCs to an atmosphere saturated with water vapor. The PCE of doped PSCs with spiro‐OMeTAD as HTL decreased 53 %, while that of nondoped PSCs with the as‐synthesized HTMs as HTL only decreased 27 % after 15 min. These result thus show a new method to improve the operational stability of PSCs, especially at high humidity levels.

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The OLED with TPD(BTPA)4 as hole transport material achieved the highest CEmax of 5.83 cd A−1 compared small molecular HTMs (Mw < 6000) with identical structure, especially operated at high current, which is due to the outstanding thermal stability.

A facile synthesis hole transporting materials (HTMs), named TTBCPE, is employed in fabrication of perovskite solar cells (PSCs). The investigated hole transporting materials w ith tetraphenylethene as core and t-butyl-carbazole as terminal units was synthesized by two steps from commercially available and cheaper raw material. The devices based on TTBCPE w ithout using of any dopants and additives exhibited a power conversion effi ciency (PCE) of 12.65 % whi ch is comparable to 14.46 % obtained by p-doped spiro-OMeTAD based devices. Importantly, the devi ce based on TTBCPE show ed more stability than the devi ces based on doped spiro-OMeTAD w hen stored in room environment. In this regard, the facile synthesis and dopant-free hole transporting materials paves a new way for developing low cost hole transporting materials.

Photon upconversion emission from rubrene in the 550–620 nm region was achieved using new soluble palladium and platinum phthalocyanine sensitizers with maximum PUC efficiency ∼5.6%, excited by a 633 nm laser with power <20 mW cm−2.

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