Optoelectron. Semicond. Tech. 58, 92-101 (2023)

A.M. Minyaylo, I.V. Pekur, V.I. Kornaga, D.V. Pekur, V.M. Sorokin



Lighting of plant crops (phytolighting) realized on the basis of LEDs has revolutionized the field of indoor

agriculture and cultivation of crops in closed controlled environments due to the possibility of optimizing the spectral

composition and high energy efficiency. The use of specialised quasi-monochromatic radiation allows the activation of

specific photomorphogenic, biochemical or physiological responses in plants, while LED radiation of a specific spectral

composition (e.g. UV radiation) allows the control of plant pests and diseases. The literature review indicates that there

is a species- and cultivar-specific response of plants to light radiation of a particular spectral composition and that this

response varies with the stage of plant development, the intensity of illumination, the duration of plant development and

specific interactions with the environment. Based on the developed recommendations for the spectral composition of

radiation intended for plant illumination, the requirements for the spectral composition of light for phytolighting

systems were determined. The efficiency of LEDs with different spectral compositions for plant illumination and the

most energy efficient LEDs for use in phytolighting systems were determined. Special software was developed to

determine the photon radiation efficiency and it was determined for a wide range of LED light sources. The LEDs

studied had photon efficiencies ranging from 3.78 μmol/J (quasi-monochromatic blue LEDs) to 5.46 μmol/J (quasi-

monochromatic red LEDs). White LEDs, depending on their colour rendering index, had a photon spectral efficiency in

the range of 4.62-4.79 μmol/J. Some modern white LEDs with a high colour rendering index have a photon spectral

efficiency close to that of phytolighting based on special quasi-monochromatic LEDs, but their efficiency, taking into

account the weighting factor of the use of photons of different wavelengths for photosynthesis, is much lower.

Keywords: LED, phytolighting, light spectral composition, colour rendering index, photon efficiency,

luminous flux utilisation factor.


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А.М. Міняйло, І.В. Пекур, В.І. Корнага, Д.В. Пекур, В.М. Сорокін



Освітлення рослинних культур (фітоосвітлення), реалізоване на основі світлодіодів, здійснило

революцію в галузі землеробства закритого ґрунту і при вирощуванні культур у закритих контрольованих

середовищах завдяки можливості оптимізації його спектрального складу та високій енергоефективності.

Застосування спеціалізованого квазімонохроматичного випромінювання джерел світла дозволяє активувати

специфічні фотоморфогенні, біохімічні або фізіологічні реакції рослин, а світлодіодне випромінювання

визначеного спектрального складу (наприклад, УФ-випромінювання) дозволяє боротися зі шкідниками та

хворобами рослин. Проведений літературний аналіз вказує на видо - та сортоспецифічну реакцію рослин на

світлове випромінювання визначеного спектрального складу і на її зміну в залежності від стадії розвитку

рослин, а також інтенсивності освітленості, тривалості розвитку рослин та специфічних взаємодій з

навколишнім середовищем. На основі розроблених рекомендацій до спектрального складу випромінювання,

призначеного для освітлення рослинних культур, було визначено вимоги до спектрального складу світла систем

фітоосвітлення. Визначено ефективність світлодіодів різного спектрального складу для освітлення рослин та

найбільш енергоефективні світлодіоди для використання в системах фітоосвітлення. В роботі було розроблено

спеціалізоване програмне забезпечення для визначення фотонної ефективності випромінювання та визначено її

для широкої номенклатури світлодіодних джерел світла. Досліджені світлодіоди мали фотонну ефективність в

діапазоні від 3,78 мкмоль/Дж (квазімонохроматичні сині світлодіоди) до 5,46 мкмоль/Дж (квазімонохроматичні

червоні світлодіоди). Білі світлодіоди в залежності від індексу кольоропередачі мали фотонну ефективність в

діапазоні 4,62-4,79 мкмоль/Дж. Деякі сучасні білі світлодіоди з високим індексом кольоропередачі мають

фотонну ефективність, наближену до фітоосвітлення, реалізованого на основі спеціалізованих

квазімонохроматичних світлодіодів, проте їхня ефективність з урахуванням вагового коефіцієнта використання

фотонів з різною довжиною хвилі для фотосинтезу значно нижча.

Ключові слова: світлодіод, фітоосвітлення, спектральний склад світла, індекс кольоропередачі,

фотонна ефективність, коефіцієнт використання світлового потоку.